Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b83ed03fa1589c5…

MALICIOUS

PDF

128.5 KB Created: 2020-09-18 11:42:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a7602c3b98adeed669d11c0b77623ef0 SHA-1: 6b9dd21a12eb9365debcfbcdfdbfc822ae3be951 SHA-256: 6b83ed03fa1589c58ff2d6cd9c8bb043dc94a47cbb0e25b0820734c4425722d2
222 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to redirector infrastructure, specifically pointing to 'ttraff.link', which is flagged as malicious. The document body, though heavily obfuscated, contains text related to tax worksheets and a URL that mirrors the malicious redirector. The presence of a link farm and ML classification further support its malicious nature, likely serving as a lure for phishing or malware distribution.

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/wix?keyword=maryland+personal+exemption+worksheet+2018 In PDF document text
    • http://files.4u2customize.com/uploads/1/3/2/6/132682565/vezodudepuzefon.pdfIn PDF document text
    • http://files.gaeunkim.com/uploads/1/3/1/4/131454986/pozori.pdfIn PDF document text
    • http://files.actionlearning.nl/uploads/1/3/0/7/130775195/wekina.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/1/0431/0401/0389/files/75197328136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1874/0134/files/infant_daily_report_for_parents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3790/9141/files/bejeweled_blitz_uptodown.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/sinafenomutimabur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3165/0453/files/78248700742.pdfIn PDF document text
    • https://711d4ea9-70e2-49da-9931-e456288cbefc.filesusr.com/ugd/cc03df_fd45359708ae442d88dbd82a8496830a.pdf?index=trueIn PDF document text
    • https://145bbc06-67e4-436d-b51f-84cc00f42c43.filesusr.com/ugd/3bbd68_adec55269df140c9ae5781babaf5c62b.pdf?index=trueIn PDF document text
    • https://a2389e72-bb03-49fd-ad9f-582615a9ee00.filesusr.com/ugd/8d5d69_e791bf24ca4e40ac9961804245f67dc9.pdf?index=trueIn PDF document text
    • https://7859b01b-a3f8-4c3e-b289-31b14c6dc25d.filesusr.com/ugd/12745a_b7d747733a45485e9f02598f4d9b722b.pdf?index=trueIn PDF document text
    • https://a22a399b-575f-4a6f-99f7-53cc083c8f97.filesusr.com/ugd/078c79_8fd4b1e935f143dba5734e849a8b31e4.pdf?index=trueIn PDF document text
    • https://db7930f8-6962-4ee4-b8ae-ff4cbee9fdcb.filesusr.com/ugd/7d21c0_3ed78506907d4844b774597fc44c6884.pdf?index=trueIn PDF document text
    • https://aa35c5eb-8a4f-4fc1-a6f6-39657cd5936e.filesusr.com/ugd/b916f4_a1c0d4e8419e4c1caf8e18cbb831ce15.pdf?index=trueIn 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_off0001afb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AFB1 6052 bytes
SHA-256: d6f4f5dea3aef9dee15a2d2c13a3197010fc8462cff4c02ac3ea639635bc8ac9
font_01_sfnt_off0001c449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C449 15428 bytes
SHA-256: ebf4595086f75f5af6e683f5bee5d77dc0b12cf4e7c20f52a9fd1010e5235903

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