Malicious PDF — malware analysis report

Static analysis result for SHA-256 60231af710ccd55b…

MALICIOUS

PDF

46.8 KB Created: 2020-08-20 08:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7608ed2527dc92b00ae3aef96bad10a3 SHA-1: 6930cc36a08630161d86a23f40e3307ef389f3ee SHA-256: 60231af710ccd55bd5c6099d45d19a8b3dadca038b68937ad5974ac80ed4c769
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches one of the embedded links, suggesting an attempt to lure users to malicious infrastructure. The presence of many external PDF links also indicates a potential SEO manipulation or link farm tactic.

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=movies+counter+2018+bollywood
    • http://files.engineersinmedicine.com/uploads/1/3/1/6/131606803/f3100.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/8281/7441/files/abn_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8664/files/dutiranesujejuponiwi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0231/files/zisepafibavopejiwedoga.pdf
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/13542283525.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/34403734569.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/58069850291.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2323/files/13795056498.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejumaxerufu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6661/4175/files/lopezomakikavuresubaruma.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9966/files/alkyd_resin_properties.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/telisupuf.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/c_shell_script_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b5f.bin
e6f8b4bfd8473ed70816f226a1024c89d4e9dbc10087d78a5e258b6b2227fc40
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5F 5524 bytes
font_01_sfnt_off00007e5a.bin
9247f8a631f3cd64e59fef5c92ad0f5981ab067854c570f696eee6e51c96c551
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5A 9920 bytes
font_02_sfnt_off0000a03c.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xA03C 4324 bytes