Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2e8307dc86ca35…

MALICIOUS

PDF

55.7 KB Created: 2020-08-14 03:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a48d84dfdd86b75ce9a23e3bd4bd1006 SHA-1: e4adf6f8b08410b4a27a0f4c61d095655f9f1ebe SHA-256: 6f2e8307dc86ca350305d81b5f504ffad7c1d4b308451fbd3d70764f908594e1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or SEO manipulation scheme, aiming to direct users to malicious infrastructure.

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=sun+planet+gear+mechanism+pdf
    • http://files.kevindexterministry.com/uploads/1/3/0/7/130738554/bipalew-gevedusu-gijufugunat-nedugipifenop.pdf
    • http://files.traumatotango.com/uploads/1/3/1/3/131384573/7501266.pdf
    • http://vepefis.healingwiththeta.com/uploads/1/3/2/6/132695375/nebujalovu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8999/3621/files/side_eye_emote.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/braveheart_soundtrack_james_horner_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5461/files/lufikoweperimipuku.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/dekofelonefa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3308/files/dusekomar.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/giloxajazomilavu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0140/5852/files/watch_smallville_online_free_megavideo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2620/9175/files/barron_s_sat_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0430/1357/0709/files/sepijurugogivu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/cfa_level_2_curriculum.pdf
    • https://cdn.shopify.com/s/files/1/0433/7208/5406/files/86360490091.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/1911563162.pdf
    • https://cdn.shopify.com/s/files/1/0432/2043/5112/files/44481245930.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_off0000932f.bin
bbd6f5ae2a3d46f711627cbc77ed9d4254cfff4ed5b3dfff76251b08512ec473
pdf-font-stream PDF embedded font (sfnt) at offset 0x932F 5672 bytes
font_01_sfnt_off0000a644.bin
d45b381c820a2fc4b26d168fd6f540da7d367eb1bc3ce859eaf1834fdfdc5367
pdf-font-stream PDF embedded font (sfnt) at offset 0xA644 13816 bytes