Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c392c6841ce292…

MALICIOUS

PDF

42.5 KB Created: 2020-08-31 00:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ef638813b79c381372fa579e79064cb SHA-1: 7cf21e018790686d990dc667808a6b6cb989dcfa SHA-256: 67c392c6841ce29274e7d0c9a5b4d116b85fbe013ab85372cb392f42014d776b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector. The document body and embedded links suggest an attempt to lure the user to a malicious site, likely for further exploitation or phishing. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination.

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/wix?keyword=del+fusible+mazda+3+2008+interior+lo
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6879/2732/files/80276665984.pdf
    • https://cdn.shopify.com/s/files/1/0436/6260/6489/files/adobe_flash_player_opera_browser.pdf
    • https://cdn.shopify.com/s/files/1/0440/8606/7352/files/zodasezepojuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/babcock_and_wilcox_boiler_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/0722/7542/files/access_iif_function.pdf
    • https://cdn.shopify.com/s/files/1/0434/0147/8300/files/celebrity_endorsement_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0461/0238/0708/files/73615918404.pdf
    • https://cdn.shopify.com/s/files/1/0430/6341/0845/files/cursive_writing_font.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/63142236032.pdf
    • https://cdn.shopify.com/s/files/1/0463/0691/8557/files/45737732644.pdf
    • https://cdn.shopify.com/s/files/1/0432/8354/6267/files/lixipenoremiwo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9793/0393/files/46999495652.pdf
    • https://cdn.shopify.com/s/files/1/0429/4246/4166/files/88467278761.pdf
    • https://cdn.shopify.com/s/files/1/0437/5347/2151/files/calculus_early_transcendentals_6e.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_off00006231.bin
74a875ab5a71e9aaa7e6fb67c26614a8550c98ad26c23a982065168518c5d7fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6231 5872 bytes
font_01_sfnt_off00007616.bin
e4e7e2dd271f1615326a1eee47f688aefe0891f63b2c5d5eed25cdfaf32631b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7616 12020 bytes