Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bd69985d9d3dcc…

MALICIOUS

PDF

38.2 KB Created: 2020-08-08 07:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbbf37c0d9035bfb3d922e3ac5a9eb40 SHA-1: d0d6c64a7b1de9d452b6d77395d34711a15eb7cf SHA-256: d0bd69985d9d3dcc3ffabceaec7897ecce4d0bc0526bd64384ff7c6676e9ff08
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The document body contains a URL that matches the redirector link found in the heuristics, suggesting the primary purpose is to redirect users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ttraff.com/pify?keyword=cambridge+test+a2+pdf
    • http://files.savlisandcompany.com/uploads/1/3/1/6/131606822/29444.pdf
    • http://files.biofieldtuning-nj.com/uploads/1/3/0/9/130969435/joxizisodobine.pdf
    • http://guzufo.megandaloz.com/uploads/1/3/1/3/131384635/bilis-sopaka.pdf
    • http://files.nextgenstockton.com/uploads/1/3/1/3/131379680/414cd5128cc24.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sasexenumufuxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46506788711.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/nonikogovagodifibusuve.pdf
    • https://cdn.shopify.com/s/files/1/0431/5542/3383/files/29785765901.pdf
    • https://cdn.shopify.com/s/files/1/0435/6636/6869/files/whiskey_lullaby_chords.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/11899769471.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/fundamentals_of_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/39348378468.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/kobun.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/bible_marking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/8279/0552/files/luwogonir.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/85908711135.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/virojatogepudofudema.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_off0000560b.bin
ecb5a47775c363c28b9627026d2f5b1e6447533042f7c3810414d74e4db3328b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560B 5504 bytes
font_01_sfnt_off000068a0.bin
f173abcf0b82b7d93602ff0cb2a781cea336b0352b11275d811785b8100446e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A0 10340 bytes

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