Malicious PDF — malware analysis report

Static analysis result for SHA-256 346b39b249af3207…

MALICIOUS

PDF

45.9 KB Created: 2020-07-26 11:27:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7d1f47a78f16853c0a4c12518f5d5e6 SHA-1: aa9b204ac02cc4a09ea179330ae15525444f0fbf SHA-256: 346b39b249af32071cbd578256e6bd1453b8c81e0357e94fd70ce6a1e949d082
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of embedded links, including a critical finding of a link to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=cg+comedy+video++tinyjuke'. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through numerous seemingly benign links. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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.com/pify?keyword=cg+comedy+video++tinyjuke
    • http://files.canmoreforestplay.com/uploads/1/3/0/7/130775897/c42ef6899a.pdf
    • http://files.x4edu.com/uploads/1/3/1/0/131071067/7ee201ea1974.pdf
    • http://files.calgarytouchrugby.com/uploads/1/3/1/1/131163955/7738513.pdf
    • http://files.vinegardenmarket.com/uploads/1/3/1/4/131483097/nopukokone-nofotine-sutozamiponaju-bejepewasibo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5812/7270/files/duwokogunixunadimipirameb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/57373474168.pdf
    • https://cdn.shopify.com/s/files/1/0437/9266/2688/files/44168538239.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/14831718719.pdf
    • https://cdn.shopify.com/s/files/1/0434/7356/7901/files/28188179142.pdf
    • https://cdn.shopify.com/s/files/1/0435/1338/1028/files/nowobasifuwisitalobusutiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/3891/4213/files/5280843056.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0956/files/xijovujusefevod.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0433/9708/7390/files/4866653587.pdf
    • https://cdn.shopify.com/s/files/1/0436/8809/9993/files/mametozorivetofimegimejo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007415.bin
6a4826ec7f35d454d41a2b15d4e9e43619a891f6f6b2c7ad22bbf4480144f307
pdf-font-stream PDF embedded font (sfnt) at offset 0x7415 4948 bytes
font_01_sfnt_off000084f3.bin
51d421fa0fd4abc5d2e3d934d1b0865800cfadd8856816d93cc85dac150f4c7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x84F3 11576 bytes