Malicious PDF — malware analysis report

Static analysis result for SHA-256 7025cdf1e2cc6424…

MALICIOUS

PDF

34.6 KB Created: 2020-08-31 01:08:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcafa773e8ff8c591950822aff90edd6 SHA-1: 166159d05058fd963a5bbd26bfb781252a8e5288 SHA-256: 7025cdf1e2cc6424f8d1d2fefc0319ae7b2a69f505a7fce4e0aa19368e9de496
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking Shopify URLs, likely part of a link farm to improve SEO and disguise malicious intent. The ML classifier strongly indicates maliciousness, and the presence of a redirector link points to a phishing or content-luring attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wix?keyword=watch+shottas+full+movie+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6374/6453/files/coles_mastercard_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3345/files/labour_force_survey_technical_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/senidadozawu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/poguridozelurax.pdf
    • https://cdn.shopify.com/s/files/1/0438/0177/2192/files/3ds_emulator_bios_download.pdf
    • https://static.usrfiles.com/ugd/b8c837_78f7a6f0881a4487a911c0985caa0178.pdf
    • https://static.usrfiles.com/ugd/15d534_5485e5984bc84f36847423e0691d4e5c.pdf
    • https://static.usrfiles.com/ugd/b5472a_a159e4d7e7094df6a7fff7d37442ecbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_b54a9d3abc9d49a990bfec7a8d823e08.pdf
    • https://static.usrfiles.com/ugd/b48b60_8739d44cd1ac4006937af3133f53a23e.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa3f79f315344e1b9542d8b04c15f966.pdf
    • https://static.usrfiles.com/ugd/74c34a_5e1a5fe19fd541aabbdc553ead7254a1.pdf
    • https://static.usrfiles.com/ugd/6cf392_d62984ff9d6349cbafef2ffb843d7050.pdf
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/stud_bolt_standard.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/1953_ford_jubilee_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/sexozomisudijetijasapok.pdf
    • https://cdn.shopify.com/s/files/1/0438/6911/0432/files/luxif.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_off00004874.bin
a28fbdf00a75e0ae4dcc63ad3178dfe8d449291a88e040b02bc2c671d4ceafc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4874 5192 bytes
font_01_sfnt_off00005a08.bin
e600086a26dc07d76e463d7819ae306db9ebe0a5ec3d126fd04b3eb74523efa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A08 10668 bytes

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