Malicious PDF — malware analysis report

Static analysis result for SHA-256 77277f605288e3fe…

MALICIOUS

PDF

40.7 KB Created: 2020-08-15 20:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5260ae2fcdf10e6ee4cc320add05eadc SHA-1: f3d07e7fb4dabb34ab433d28a4ee1b1d48791bbe SHA-256: 77277f605288e3fe405fe300ff4232ee14c6be1c1bfd299aac023d49d3e611aa
154 Risk Score

Malware Insights

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

The PDF document contains embedded URLs, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to contact information. The presence of numerous external PDF links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the redirector URL is the primary indicator of malicious intent.

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=albie+sachs+contact+information
    • http://files.noretasdecor.com/uploads/1/3/1/4/131453902/f352e04c6aaea.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8250/4600/files/21141849626.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/retro_tv_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0437/5530/7159/files/gifemajaketafuzo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4551/9513/files/38369337505.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/nuxurilemodut.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/mefirulutenezosilexizobus.pdf
    • https://cdn.shopify.com/s/files/1/0437/1133/2503/files/62699915905.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6250/files/81744423750.pdf
    • https://cdn.shopify.com/s/files/1/0454/2365/7118/files/82192083765.pdf
    • https://cdn.shopify.com/s/files/1/0437/9721/7440/files/angry_birds_transformers_telepods_qr_codes_hack.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_off0000611a.bin
07de80a8c373ee7993be06a4ec98ce4732a478d41a0442d8c94fa196baad1843
pdf-font-stream PDF embedded font (sfnt) at offset 0x611A 5248 bytes
font_01_sfnt_off000072b6.bin
8e3b322e39d433af23419224082527c2eb93193c18b76f40fc6e8d6c3a3c4402
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B6 10364 bytes