Malicious PDF — malware analysis report

Static analysis result for SHA-256 197c601eafe1597e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-14 18:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82f07d121569991fab50e2c4203d277a SHA-1: 6cab76bc0dd47ee93bf1d734dc46e8289083b263 SHA-256: 197c601eafe1597e3de99bcbdf6b29476d1b948d97dd040ec3419bc51e29b2bc
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, which is indicative of a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a potential distribution or redirection mechanism. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive traffic or potentially distribute further 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.cc/wb?keyword=manual%20comunicare%20in%20limba%20romana%20clasa%203
    • http://files.beingfrankblog.com/uploads/1/3/1/4/131407549/c68ab8b55c44f2.pdf
    • http://juzon.lightoftheworldcoaching.com/uploads/1/3/0/7/130775405/fabupolin_jetazegodubez_lopega_kaboxaku.pdf
    • http://files.womenspeakup.org/uploads/1/3/0/7/130775109/zodowopixikem.pdf
    • http://bukimilu.mccannpetgroup.com/uploads/1/3/0/8/130814297/8806225.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0453/9963/8184/files/zefajexuxolinibami.pdf
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/giropuratakuxoruzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8887/9521/files/ball_mill_process.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7999/files/systematic_and_unsystematic_risk_in_financial_management.pdf
    • https://cdn.shopify.com/s/files/1/0447/6190/7351/files/begum_rokeya_university_admission_circular_2020_20.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/ielts_vocabulary_list_for_listening.pdf
    • https://cdn.shopify.com/s/files/1/0445/3564/4319/files/bobina_de_tesla_principios_fisicos.pdf
    • https://cdn.shopify.com/s/files/1/0433/6356/5718/files/91849778782.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6260/files/tuwiroveranogape.pdf
    • https://cdn.shopify.com/s/files/1/0433/4888/5662/files/pojebadunujakakugegesiziz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5893/files/rezajisupul.pdf
    • https://cdn.shopify.com/s/files/1/0432/8275/9836/files/italy_travel_guide_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3059/3192/files/697257753.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f3d.bin
1cf6003d7f5ea9a4479d6ee9535db0dc2e6eb8124149568b22e3d290573658c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3D 5256 bytes
font_01_sfnt_off000070fb.bin
f2c43b42b9c78577cd725dfba5a3d43570f2d3c8dfc76607f539ad1697f9ec7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70FB 10780 bytes
font_02_sfnt_off0000933a.bin
dc620336aa769c766927a552749f6283a30952bf3238451f386faf844582b0a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x933A 16344 bytes

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