Malicious PDF — malware analysis report

Static analysis result for SHA-256 74f5ae1ca9c54583…

MALICIOUS

PDF

49.7 KB Created: 2020-08-03 04:11:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 99e906063253e5a6ec38fe883e0503e6 SHA-1: e0bfe06704e951404a684af3f3fece85a26337ad SHA-256: 74f5ae1ca9c54583bc5320d8376e5e0673615cbed21fe3d099277afa8f06c414
154 Risk Score

Malware Insights

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

The PDF document contains numerous links, including one identified as a malicious redirector. The primary malicious link, 'https://ttraff.com/wb?keyword=preparing%20for%20a%20job%20interview%20in%20english%20pdf', is presented under the guise of job interview preparation, likely to deceive users into clicking it. This redirection mechanism is a common tactic for delivering further malicious content or phishing pages.

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/wb?keyword=preparing%20for%20a%20job%20interview%20in%20english%20pdf
    • http://files.juliecasperroth.com/uploads/1/3/1/3/131383358/fetitatudunus.pdf
    • http://files.edwardellsberg.com/uploads/1/3/1/8/131857304/jigubobuvas.pdf
    • http://files.keverse.com/uploads/1/3/2/3/132303269/cebb1f79baad2.pdf
    • http://files.highwayhomestead.org/uploads/1/3/0/8/130873849/giponosigawoto_morimal_kefivud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/kojodida.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2088/files/padinezepoturorer.pdf
    • https://cdn.shopify.com/s/files/1/0440/6640/6550/files/tonirewojexike.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/6413321228.pdf
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/fedemuferexozamolu.pdf
    • https://cdn.shopify.com/s/files/1/0449/9764/0360/files/guy_with_glasses_meme.pdf
    • https://cdn.shopify.com/s/files/1/0437/1991/7720/files/93351931624.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5895/files/86890799380.pdf
    • https://cdn.shopify.com/s/files/1/0435/9703/7730/files/varopewetuxuku.pdf
    • https://cdn.shopify.com/s/files/1/0434/0934/2621/files/18835596942.pdf
    • https://cdn.shopify.com/s/files/1/0432/0247/8242/files/liramejegik.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_off0000825f.bin
de89a38e29ae3d70288427f7332c22184b774a6edc831fb64b070dd29411e15d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825F 5672 bytes
font_01_sfnt_off000095b4.bin
e68a9ebd435ac8abc9a3ccf0e6d7c931380f90fced53209881b79846397880ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B4 10484 bytes

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