Malicious PDF — malware analysis report

Static analysis result for SHA-256 75765416f976ffe2…

MALICIOUS

PDF

48.7 KB Created: 2020-08-17 04:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6adf086b067bc9736ad33a7fc48db27 SHA-1: 0511a00f7b52428c288f3f532562a409560fb2ec SHA-256: 75765416f976ffe27807f0110997c4ac553224b1e51827cd4c53d0adacf66ee0
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed for SEO manipulation. One prominent URL, https://ttraff.ru/pify?keyword=keynote+template+free+business, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this malicious URL and other benign-looking Shopify links, suggesting a lure to trick users into visiting malicious infrastructure. No scripts were extracted, but the presence of malicious redirectors and link farms strongly indicates a phishing or scam attempt.

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.ru/pify?keyword=keynote+template+free+business
    • http://files.lynxidg.com/uploads/1/3/0/8/130813747/zimeneziw-pagawire-dowafarimijeg-niliwa.pdf
    • http://files.thetipiraisers.org/uploads/1/3/1/6/131637419/ab8e2bdab.pdf
    • http://dabir.mckenziesinfinity.com/uploads/1/3/1/4/131407406/03ce7b0.pdf
    • http://monorowex.thejeremycorbyneffect.com/uploads/1/3/1/3/131380983/6163546.pdf
    • http://files.yenbai.life/uploads/1/3/2/3/132303351/zexipivemiveru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/7421/6351/files/yasin_sura.pdf
    • https://cdn.shopify.com/s/files/1/0447/0230/2362/files/arcgis_enterprise_10._5.pdf
    • https://cdn.shopify.com/s/files/1/0428/2603/9463/files/73901251317.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/lagiluge.pdf
    • https://cdn.shopify.com/s/files/1/0437/2178/5498/files/timalakasa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3668/0098/files/36927197091.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/88795764977.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2155/files/76081706522.pdf
    • https://cdn.shopify.com/s/files/1/0433/3230/5054/files/10237516630.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/lisufifixipiwokexumudijiz.pdf
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/kowaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/3776/1437/files/chill_bill_whistle.pdf
    • https://cdn.shopify.com/s/files/1/0433/7664/0156/files/wreck_it_ralph_hentai.pdf
    • https://cdn.shopify.com/s/files/1/0432/0667/2546/files/22001139103.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bokowolexom.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072f2.bin
57dabf1d5c42873302b59a7acd87db071cc4cd579f46a52d8a16944be8c458bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F2 5140 bytes
font_01_sfnt_off00008458.bin
60c2f68c494dd3f78bd8524a86382757ffd656d76c4aa5c7fe7f5b6416bf7e90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8458 10280 bytes
font_02_sfnt_off0000a787.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA787 4324 bytes

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