Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a17166a48f136e5…

MALICIOUS

PDF

39.4 KB Created: 2020-08-15 19:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e4337a7f7da5c95d892e79195bd094f SHA-1: 3a0d400646388bdf4f4f15353634f4c56725ed19 SHA-256: 7a17166a48f136e534fc60064c1adf8ad1d01c013421da7ae4d80d415cc93cd2
254 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious redirection and a lure for credential or MFA harvesting. The document body, though obfuscated, contains a URL that matches the malicious redirector found in the heuristics. This suggests the primary goal is to redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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/wb?keyword=mahanagar%20gas%20new%20connection%20form%20pdf In PDF document text
    • http://wexusus.johnsastrophotos.com/uploads/1/3/1/6/131606490/lirexapodo.pdfIn PDF document text
    • http://files.survivinglifechallenges.com/uploads/1/3/2/3/132303286/7404501.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/10514557695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/xfinity_tv_remote_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4679/5424/files/86835532365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/99983548079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7646/0448/files/89222494477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7323/6131/files/beninca_brainy_24.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6662/2106/files/milerigudupegejaxagox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7614883084.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/gobiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/binika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6840/5413/files/jisijanulupi.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 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2A 5632 bytes
SHA-256: f94c76b3745fb903cb4fd13db4f63f0414aeb3787f90fcea99e22cf97dc4ffb7
font_01_sfnt_off00006e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E3B 10148 bytes
SHA-256: 978cf76b60bc55299d670f6b363000418068c6a24a69b4dd1b47144c8b3a629b

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