Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e37fa197a417d0e…

MALICIOUS

PDF

51.4 KB Created: 2020-08-25 11:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 611d1509e53132455a96303ad5a29270 SHA-1: cc6453a240e15c79422f84073f361c4d5fd66ca9 SHA-256: 5e37fa197a417d0e5f6848c069f63801db21b665863c2a94a4779291c3346396
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'oil and gas well completion report' and the wkhtmltopdf application, suggesting a lure. The presence of many external PDF links, some pointing to potentially malicious domains, indicates a link farm or redirection strategy. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=oil+and+gas+well+completion+report
    • http://ripobaxev.heartheartheartearth.com/uploads/1/3/1/4/131407558/zapeminolodopos.pdf
    • http://files.westcarypsychiatry.com/uploads/1/3/2/7/132712096/7721647.pdf
    • http://files.goldfishprints.net/uploads/1/3/1/8/131871569/6289455.pdf
    • http://jabaneku.doulasinatlanta.com/uploads/1/3/2/7/132712062/dinafen.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/aoac_methods_volume_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/56809776110.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/xulutifovovi.pdf
    • https://cdn.shopify.com/s/files/1/0452/5395/1650/files/tetulalodofasalupose.pdf
    • https://cdn.shopify.com/s/files/1/0439/5276/7131/files/gozazomuziradoludepe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/49239837947.pdf
    • https://cdn.shopify.com/s/files/1/0431/9703/8756/files/83955475938.pdf
    • https://cdn.shopify.com/s/files/1/0431/2147/5740/files/materialismo_dialtico_e_psicanlise.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8764/files/safewesepaxovuparoxiw.pdf
    • https://cdn.shopify.com/s/files/1/0435/4375/6954/files/gedomef.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0087/files/vuvapejeruwidufodatekipil.pdf
    • https://cdn.shopify.com/s/files/1/0430/3329/7058/files/enterprise_blockchain_platform_comparison.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/limoze.pdf
    • https://cdn.shopify.com/s/files/1/0438/8965/5960/files/pluralisme_religieux.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_off00008204.bin
4648405a8bbac030d6c941c78fd6b3dd3bddcb6f3c6b17f093d6a208da039218		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8204 5512 bytes
font_01_sfnt_off000094b1.bin
6d5428d9a25397e9c262dfd67bde5f6d92d41570d5e2cc249f358eba166ef54f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94B1 14380 bytes

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