Malicious PDF — malware analysis report

Static analysis result for SHA-256 cacf8a58add911e5…

MALICIOUS

PDF

26.2 KB Created: 2020-10-27 14:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e80280fec982b980854ed8bfc53e87c5 SHA-1: d43285106e49ef1c3ec193c7108009c5daff2bf1 SHA-256: cacf8a58add911e5ec6471c0e8b4d5a41343a96a4cb4a11d0e912a65569b0683
152 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 at 'https://cctraff.ru/strik?keyword=cottage+farms+direct+qvc'. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 3

  • 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.
  • 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://cctraff.ru/strik?keyword=cottage+farms+direct+qvc
    • https://pexulowiseguwuz.weebly.com/uploads/1/3/4/3/134391342/672415a.pdf
    • https://nulosogitizibe.weebly.com/uploads/1/3/4/3/134317173/988202.pdf
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/0c21e.pdf
    • https://pegepefip.weebly.com/uploads/1/3/4/4/134455730/kobexeso.pdf
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/d0b98e7b0c.pdf
    • https://rudofodirofebas.weebly.com/uploads/1/3/0/7/130739781/6634275.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pazifetanegapu/kozobon.pdf
    • https://s3.amazonaws.com/dukajevo/wuzevametefijawebowij.pdf
    • https://s3.amazonaws.com/fasanag/72901694732.pdf
    • https://s3.amazonaws.com/jamokaroxoj/nojijex.pdf
    • https://s3.amazonaws.com/sugaguxagu/pawoxuwomowejubili.pdf
    • https://s3.amazonaws.com/pisik/list_of_integration_formula.pdf
    • https://s3.amazonaws.com/tigovatolis/5814414750.pdf
    • https://s3.amazonaws.com/wibadinavosunom/pibolavobadenuzemow.pdf
    • https://cdn.shopify.com/s/files/1/0485/7849/4624/files/bollinger_on_bollinger_bands_ting_vit.pdf
    • https://cdn.shopify.com/s/files/1/0490/4350/5329/files/manual_book_plc_omron_cp1e.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9652/files/odins_breeding_guide_war_dragons.pdf
    • https://cdn.shopify.com/s/files/1/0501/1973/7544/files/nafamokujoge.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b3e.bin
8fca7b385fe359add0fa928e9708f7666dcfb1bc2760231166c500c44e760866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B3E 5400 bytes

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