Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b50ca83aec0582f…

MALICIOUS

PDF

40.7 KB Created: 2020-08-21 08:00:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 693b5c443449b5a7eb1dce31eddb2a9b SHA-1: 1f065e31b446d35bd690f3b265f4d85ee1cf9621 SHA-256: 7b50ca83aec0582fa622cf5449c12d9c74878b780f65d310f4032ca88510fc1e
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, appears to contain text related to a 'motivational poster meme template' and includes the malicious URL. This suggests a phishing or scam attempt designed to redirect users to harmful content.

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.cc/pify?keyword=motivational+poster+meme+template
    • http://files.primaverapreschoolatl.com/uploads/1/3/0/8/130874125/poxomi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/masofibefakovotaxugawaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3863/8241/files/dojuresezizefebarebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7667/3946/files/juzanusirimefojoje.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/xenonovalusumomem.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4214/files/xumipudejoderuzuwulobu.pdf
    • https://cdn.shopify.com/s/files/1/0436/5497/1557/files/32072948648.pdf
    • https://cdn.shopify.com/s/files/1/0434/0898/2165/files/zipujuruliluxetafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4837/files/76822827161.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97428896976.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/bijuxaruwesudoluwixafiga.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0014/files/concatenate_string_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/9977/3341/files/tutebitisoje.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/musiwumelaroribaribuwisa.pdf
    • https://cdn.shopify.com/s/files/1/0433/4541/2245/files/renew_texas_drivers_license_online.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_off0000536b.bin
e03ed9bb34a90ffa355f7869b8f124f4ed73311f88b046967d5664a95ca1cc2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x536B 4816 bytes
font_01_sfnt_off000063af.bin
0b2869adfc16cd9a2264183c3015df7818adc39c97b7541577cd0b291175688c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63AF 10608 bytes
font_02_sfnt_off00008807.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8807 4324 bytes

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