Malicious PDF — malware analysis report

Static analysis result for SHA-256 33ff7127930c7802…

MALICIOUS

PDF

40.7 KB Created: 2020-07-31 22:08:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c3d32b8f92c7979b9f5546116a264bd SHA-1: 85b2b462040ae008a4fe6a950cba0677082b1a38 SHA-256: 33ff7127930c78027363c45b82c98415261d14f54d84fd74d12048e247922ae0
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector infrastructure, disguised as a lure for GTA V cheats. The ML classifier strongly flagged this PDF as malicious. The embedded links likely lead to further malicious content or phishing pages.

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=gta+v+pc+cheats
    • http://files.hawaiihomeschoolnetwork.com/uploads/1/3/1/4/131452904/zogani.pdf
    • http://files.eclawyers.com/uploads/1/3/1/4/131408942/dexoxujesuf.pdf
    • http://files.kingofcarsandcoffee.com/uploads/1/3/1/3/131398134/fazulovemeginavugu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/96100593808.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/posiguz.pdf
    • https://cdn.shopify.com/s/files/1/0428/6277/2380/files/fivimabovofoxujopazal.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/dumixof.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/wolatonagarutukiranaba.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/zinawojiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1793/files/63517425351.pdf
    • https://cdn.shopify.com/s/files/1/0428/8669/3023/files/41499790550.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5209/files/gezumo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0020/files/33516042613.pdf
    • https://cdn.shopify.com/s/files/1/0434/3182/1473/files/dukomuxadejudavuziju.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8053/files/lematesawewizixez.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_off0000627c.bin
3047054925d28d9850fb907ae4213bcc9441a51f72f906c1af6d2b030d606282
pdf-font-stream PDF embedded font (sfnt) at offset 0x627C 4984 bytes
font_01_sfnt_off0000737e.bin
1a660710b75127ade06218f645288023e03531d500aa6ba99aef3b0bef04b00a
pdf-font-stream PDF embedded font (sfnt) at offset 0x737E 10180 bytes