Malicious PDF — malware analysis report

Static analysis result for SHA-256 0741b31eb90e8ef9…

MALICIOUS

PDF

41.7 KB Created: 2020-08-30 21:58:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 865b312f58bb8cf48a108e6aaa15f1b4 SHA-1: ef69e23def9de11403dc604b842395164d901cb9 SHA-256: 0741b31eb90e8ef91cf80ddf87737d2bda30b67d6df9595b7764276ad476acef
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to 'unblocked games' and the malicious URL, suggesting a lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to distribute the malicious 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.com/wix?keyword=unblocked+games+tank+trouble+deathma
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/70706569732.pdf
    • https://cdn.shopify.com/s/files/1/0438/1691/1010/files/working_with_emotional_intelligence_daniel_goleman_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/piwataku.pdf
    • https://cdn.shopify.com/s/files/1/0434/1576/5153/files/gelokakojo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/96720182076.pdf
    • https://static.usrfiles.com/ugd/2074c9_ba2f6ddc64df478393839629371dc2c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_8cf06fdd122449ec81ad31ad315fea58.pdf
    • https://static.usrfiles.com/ugd/b8c837_75bee5003aae441fa7180ee3df48be7c.pdf
    • https://static.usrfiles.com/ugd/a91264_608a7ab11e13494ab01b96180389bab6.pdf
    • https://static.usrfiles.com/ugd/c0b427_6f9b31b8961148b68f75579929a34719.pdf
    • https://static.usrfiles.com/ugd/b8c837_5cd4cb3a00ee47cca8d3479074a167e3.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/manual_prtico_de_auriculoterapia.pdf
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/teruk.pdf
    • https://cdn.shopify.com/s/files/1/0436/7292/8409/files/procare_cool_mist_humidifier_pccm_840_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/31146810724.pdf
    • https://cdn.shopify.com/s/files/1/0433/9266/3702/files/best_argumentative_essay.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_off000063cb.bin
2b9f6e3acce58c5a40456132008ae5879fd7b3423184efb6d08dd9a4c006d44b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63CB 5548 bytes
font_01_sfnt_off00007679.bin
e97918fb81a93c7c8fa2ab2c5d99fd5d2a7aed710b25416006a089de071dccab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7679 10396 bytes

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