Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fb8dc9134f3fe0d…

MALICIOUS

PDF

38.3 KB Created: 2020-09-14 00:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 007c416fb4615d5185f7e06a07bf8713 SHA-1: 0cd6355ff8a6df7cdbfc7c624d9711d8169aeb7b SHA-256: 3fb8dc9134f3fe0d4281945ffd73c8e38286c485415cff61cd56a5b02e3a969e
254 Risk Score

Malware Insights

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

The PDF contains a mass external link farm and a specific malicious redirector URL, indicating a lure to a potentially malicious site. The document body and heuristics suggest a payment redirection or callback phishing scheme, aiming to trick users into fraudulent transactions or support scams. The primary malicious IOC is the redirector URL, which is designed to lead users to a compromised or malicious destination.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.club/pify?keyword=smart+switch+apk+for+iphone In PDF document text
    • http://batija.honestdefender.com/uploads/1/3/1/0/131070588/7056715.pdfIn PDF document text
    • http://lurigu.mkrishnan.com/uploads/1/3/0/7/130739706/549d9c608263.pdfIn PDF document text
    • http://files.rhsesports1.org/uploads/1/3/0/9/130969960/zefuzebuxutese-tapavufosowuz-tugapiwat-gizekozabokesek.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/1/0430/4565/0586/files/kingfisher_calendar_2020_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/71394340077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/50071708516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/18285369868.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/pifaw.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1cc777_4a30cd5bdd8849a2aaf4c38680f7f07e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d9d1f5_cc6b6752019541b393e53762f0adfd59.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 8

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_off00005810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5810 5484 bytes
SHA-256: 0d1c3a53257c14bf08c2eeadda7bbf1c6a90799e84f74ec3a57ded2c43d2a9a8
font_01_sfnt_off00006a9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9B 9968 bytes
SHA-256: 4f4c03d3c4619f041af8b3de4f2586753c1878cb61ad6db4960487788b11f492

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