Malicious PDF — malware analysis report

Static analysis result for SHA-256 084c46b6c303c1ea…

MALICIOUS

PDF

42.0 KB Created: 2020-08-01 14:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40540115367b39bed7e671fbe7d73dbf SHA-1: fe86902c999d0fc47770af901da029143f01fab7 SHA-256: 084c46b6c303c1ea264f575ae0dfc21f12f67e7f032961d0afee98889d204ff3
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier and contains heuristics indicating it's a redirector link to known malicious infrastructure and part of an advance-fee scam. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=ing+direct+ca, which is also listed as a suspicious URL. The presence of numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggests a link farm or redirection strategy. The document also exhibits characteristics of a callback phishing lure, asking the user to contact a number in a billing or fraud context.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.
  • 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=ing+direct+ca
    • http://files.corinthianmissionarybaptistchurch.com/uploads/1/3/1/4/131437041/dijuma_vidinepom.pdf
    • http://files.thenewschoolpreschool.com/uploads/1/3/1/0/131071019/dakopisujadiguzu.pdf
    • http://files.sportsvisionpros.com/uploads/1/3/0/9/130969884/tobepo.pdf
    • http://files.ewerockfarm.com/uploads/1/3/0/8/130814280/3175306.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8395/4328/files/62392190740.pdf
    • https://cdn.shopify.com/s/files/1/0438/4007/7986/files/fakigez.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/32678454459.pdf
    • https://cdn.shopify.com/s/files/1/0437/8220/9698/files/porokopomokuwu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4594/files/77192129601.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/70117309410.pdf
    • https://cdn.shopify.com/s/files/1/0435/6905/3854/files/fawudawezum.pdf
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/dezipafin.pdf
    • https://cdn.shopify.com/s/files/1/0440/4707/3445/files/jomizomoj.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066c6.bin
0e0fe67b3742c1558e82d1a98e1ce9d96ba5f77f53a71488f27678d90a1cf770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C6 4832 bytes
font_01_sfnt_off00007743.bin
aeaa9d5dceb11b1b0a30a6b34d7a4dc87a5cfbcae5c17963a2e2568c04e9ec2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7743 10632 bytes

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