Malicious PDF — malware analysis report

Static analysis result for SHA-256 711f52f19e73aa81…

MALICIOUS

PDF

54.6 KB Created: 2020-08-12 13:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8688e3ff25d0d5814338678e1651326 SHA-1: 48e5f69321049f19c88aeb50ff6035b2d0c317b3 SHA-256: 711f52f19e73aa81bfb2f1a65ff7ac77a4098b323e28fede489da3a35301d14f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to various external resources, with one specific URL identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to disguise the malicious intent. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a coordinated effort to distribute potentially 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.com/pify?keyword=riesgo+cardiovascular+pdf+chile
    • http://files.integrativemassageworks.com/uploads/1/3/2/7/132740549/9035614.pdf
    • http://files.stephenhowardharrison.com/uploads/1/3/2/6/132696598/a15af9dff91a83.pdf
    • http://veraxam.mountaintherapygroup.com/uploads/1/3/0/7/130738524/zosumiwixinazu.pdf
    • http://files.cavecastlegolfclub.co.uk/uploads/1/3/0/9/130969034/1d277247d.pdf
    • http://fovirilab.alextoenniges.com/uploads/1/3/2/6/132681504/nekijizim-xabixirapas-pusosiraz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/minecraft_trapdoor_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/futaxiket.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/torujanadusubarasojulul.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8369/files/guxexak.pdf
    • https://cdn.shopify.com/s/files/1/0435/5470/1463/files/basic_computer_skills_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/seagate_hardrive_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0438/6678/3899/files/gibugorewuvabade.pdf
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/nesabubavoworegozorete.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7303/files/analytical_biochemistry_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/2681/5903/files/77086391710.pdf
    • https://cdn.shopify.com/s/files/1/0446/6475/0243/files/associer_plusieurs_pages.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ledoviz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8537/files/gipidabotobanaxafumidufa.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_off0000963a.bin
3317565b678b23225ac0f0c3642aacaaf189b678843d99c4df1826eb82d8025e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x963A 5484 bytes
font_01_sfnt_off0000a8e2.bin
2fde6f2dae53bd141ebba94a16c6a59dcf0c6bd8d8c2dd0fb23bf50021a61373		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E2 10552 bytes

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