Malicious PDF — malware analysis report

Static analysis result for SHA-256 26743fb011135462…

MALICIOUS

PDF

44.7 KB Created: 2020-09-05 05:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13865b9a730723815895d9097db23f66 SHA-1: 6ed05be5975b59d00f1265efa0044513650a6bc2 SHA-256: 26743fb01113546288dafc2d974e40ae2bbe2790638154807bf0b4944f7bb56a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to malicious infrastructure, disguised as a download for game cheats. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the suspicious URL and references to game cheats, reinforcing the lure. The presence of numerous external links, many pointing to Shopify, suggests a link farm used for SEO poisoning to attract victims.

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.link/pify?keyword=gta+vice+city+san+andreas+cheat+apk
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/national_payment_system.pdf
    • https://cdn.shopify.com/s/files/1/0430/7812/3669/files/rineluravuzurudimigipa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/affairscloud_monthly_current_affairs_quiz.pdf
    • https://cdn.shopify.com/s/files/1/0435/6400/7583/files/24499358022.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/49163139263.pdf
    • https://static.usrfiles.com/ugd/811c4f_f28470f203d74572afcb2b91726bfb0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f11a8352be5450d9965ac217684a88d.pdf
    • https://cdn.shopify.com/s/files/1/0434/2723/3954/files/autobus_marbella_malaga_aeropuerto.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/stig_severinsen_breatheology.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/ronifozev.pdf
    • https://cdn.shopify.com/s/files/1/0432/5949/4555/files/lonitegenuluzetan.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000644a.bin
e110f9ce97d5eab9f456bc5b74d676dd9ac4479c3b70b0d528090bedd6987335
pdf-font-stream PDF embedded font (sfnt) at offset 0x644A 5064 bytes
font_01_sfnt_off0000757e.bin
602dab27f781bb91984ea3321e9a9471f8809d8d8a141ad4888418938523a7de
pdf-font-stream PDF embedded font (sfnt) at offset 0x757E 10144 bytes
font_02_sfnt_off0000982f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x982F 4324 bytes