Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d95d7a5abfc4fa3…

MALICIOUS

PDF

51.3 KB Created: 2020-08-18 15:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c967dd3454c667f29da80556e4bddd93 SHA-1: 1ec3d039877509599807209ea64d6251d4877a4b SHA-256: 6d95d7a5abfc4fa32a5d48db7b557df478998fb998444a936c1b4fa4dd4ef469
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.cc, which is likely intended to lead the user to further malicious content or downloads. The document body also contains a large number of embedded URLs, many of which point to Shopify domains hosting PDF files, suggesting a link farm or SEO manipulation tactic. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a malicious intent.

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=alvaro+soler+la+cintura++mp4
    • http://files.fcproducts.co.za/uploads/1/3/1/4/131407112/mabopefarutexisefa.pdf
    • http://files.main-global.com/uploads/1/3/1/4/131411688/1025640.pdf
    • http://gasuju.davidstrailendurancerun.com/uploads/1/3/1/1/131164406/ganexudozuwek.pdf
    • http://files.wilkinsonbrian.com/uploads/1/3/1/6/131606349/jewivawegilu_kabofivajepawuj_wusiwigopuzo_pivigoweli.pdf
    • http://files.ghpcounselingservices.com/uploads/1/3/0/7/130774979/jepojalojovosetejigu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/rofupek.pdf
    • https://cdn.shopify.com/s/files/1/0428/1725/7628/files/47118128574.pdf
    • https://cdn.shopify.com/s/files/1/0439/5863/2606/files/16105055583.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5308/files/gevuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5811/8312/files/basic_english_grammar_test_bank.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/11563232946.pdf
    • https://cdn.shopify.com/s/files/1/0438/2280/9250/files/kotisewulivitaji.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/bicester_village_vip_card_invitation_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/3897/3857/files/cursive_alphabet_practice.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/madarasaguzej.pdf
    • https://cdn.shopify.com/s/files/1/0436/4645/1862/files/loduwitobupelixuredawusom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/81535078734.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000542a.bin
44e2b6e7a4adc29564b096b6e3e8540ece45da5ca89e4df17e8d8116f38ca847		 pdf-font-stream PDF embedded font (sfnt) at offset 0x542A 5216 bytes
font_01_sfnt_off000065d2.bin
53194ddd84c3c107330ea3f95a64e265991c13ccacaa9dbf9d33c4b07892070e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D2 3596 bytes
font_02_sfnt_off000073b9.bin
87132d9356fabcaa616594cfb1a32d1978cbb9efafa823df83d6fce13e9e8650		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B9 14152 bytes
font_03_sfnt_off00009eea.bin
3ae7473ac9b9efba0ad22257b8a47a6d36a93296ed98301099a254c9e4244d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EEA 19128 bytes

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