Malicious PDF — malware analysis report

Static analysis result for SHA-256 52b9b1aa119871b3…

MALICIOUS

PDF

44.9 KB Created: 2020-08-18 12:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a1baad2989fe2943058de949d66a4b3e SHA-1: e0f1dc4e52da97baeaf76befd924e7e258bb2392 SHA-256: 52b9b1aa119871b31c070d24cacee2008c549703c9b72ed9c98015e99d885119
262 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link pointing to 'ttraff.ru' which is associated with phishing lures. The document body, though heavily obfuscated, contains text related to 'Equifax free credit report address', aligning with the 'SE_INVOICE_LURE' and 'SE_MFA_LURE' heuristics, suggesting a credential harvesting or phishing attempt. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm used for SEO poisoning to attract victims. The primary malicious IOC is the redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=equifax+free+credit+report+address In PDF document text
    • http://files.hungrywhales.com/uploads/1/3/0/7/130776272/05c66996daa.pdfIn PDF document text
    • http://files.stpaulscanton.org/uploads/1/3/1/8/131856086/38bcd4fa1ec2e0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/toefl_ibt_practice_test_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/67963542822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0428/1511/files/jejij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/37503125133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/71373530442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/vijala.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/23529771626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/blades_of_brim_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53295895336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4977/0389/files/wewazejoduloginaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7290/3585/files/lesodinebomomegetifiluguj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/30828196751.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6577 5044 bytes
SHA-256: 4ddbbdf42165c34f7818ff330841f9b22923d54aba8caa24313994426bc693e0
font_01_sfnt_off000076b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B3 9928 bytes
SHA-256: b07ee8c442df2bd310bcf0399b7b31723c85dc5d152e7c80e85b1a9805ca87bf
font_02_sfnt_off000098a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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