Malicious PDF — malware analysis report

Static analysis result for SHA-256 3415d8d832ed33e7…

MALICIOUS

PDF

44.1 KB Created: 2020-08-17 12:53:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdc2c9044ccf6b18da89f98e05fb2f71 SHA-1: 5f0fa4c22fcf565fb87d5a074f1638bab5b6f9b1 SHA-256: 3415d8d832ed33e7ceb6f893d4e64a0951fc332f9f37eb9fdb6f49c8bb151ae4
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, with one identified as a known malicious redirector. The document body, though corrupted, contains text suggesting urgency, aligning with a phishing lure. The presence of numerous external PDF links suggests a link farm, potentially for SEO manipulation or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.ru/pify?keyword=monte+bassinet+sheet+size
    • http://files.theformerathletefitness.com/uploads/1/3/1/4/131483371/fofejobifob-pefap.pdf
    • http://wevovo.jimhoneygardens.com/uploads/1/3/1/6/131637016/24879fb5d8a0955.pdf
    • http://files.garryoak.info/uploads/1/3/1/4/131410094/c9116763d2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/nedirutaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/turuwifuganalagerolojuxaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/harbor_breeze_remote.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0758/files/pewixerinubazulo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/dentrix_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/kogiket.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/39461303913.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/35466450310.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/partes_de_aspersora_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/sodipatow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6491/files/theories_of_entrepreneurship_education.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3622/files/sezexiluvuxeti.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_off00006f81.bin
9227bbf68814ef0d2df534be36f1ec43492d08ac7ff9a73981bd70036b1e0956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F81 4840 bytes
font_01_sfnt_off00008003.bin
37694c50433228f36dfbbb648643db1e43c7ce838b0ae4b268098ef84b0916b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8003 10504 bytes

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