Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4b15ac2caa16808…

MALICIOUS

PDF

49.0 KB Created: 2020-07-29 20:44:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2eaf62ade7be07a8c5e8d50606b0e3f SHA-1: e50f168706cde4d10caf0204edaab174f1facf60 SHA-256: f4b15ac2caa168088489ed4654dff8c6d89aab8cd0e2050bf7cceaa017841d1c
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, suggests a lure related to 'Marina Abramovic book pdf'. The presence of numerous external links, as indicated by PDF_SEO_LINK_FARM, further supports a malicious intent to drive traffic to potentially harmful sites. The ML_NYX_PDF_MALICIOUS heuristic strongly supports the malicious classification.

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.cc/pify?keyword=marina+abramovic+book+pdf
    • http://files.janeshannonphotography.com/uploads/1/3/1/3/131383544/1916874.pdf
    • http://files.springdalesva.com/uploads/1/3/1/4/131408170/sifasogot.pdf
    • http://files.tomsbeachhouserentals.com/uploads/1/3/1/3/131381078/4ce810163bffc.pdf
    • http://files.bad-media.com/uploads/1/3/0/7/130775958/janufenazola_fijaf_sugexigodaxo_jepos.pdf
    • http://files.inyourskivvies.com/uploads/1/3/1/1/131164198/7712da.pdf
    • http://files.janeshannonphotography.com/uploads/1/3/1/3/1313835
    • https://cdn.shopify.com/s/files/1/0440/7807/1960/files/46953746706.pdf
    • https://cdn.shopify.com/s/files/1/0433/4570/7166/files/2121800584.pdf
    • https://cdn.shopify.com/s/files/1/0430/9961/9492/files/84526643930.pdf
    • https://cdn.shopify.com/s/files/1/0440/1650/0886/files/zukoweniruligekimisu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/posoriwifokewibig.pdf
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/bifineneruzomu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/xobebuwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1438/1980/files/fanazejemefitan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/salelixakibikiziz.pdf
    • https://cdn.shopify.com/s/files/1/0428/8613/5961/files/nibudodaziteruvelesa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8729/7696/files/9493094050.pdf
    • https://cdn.shopify.com/s/files/1/0432/1666/6786/files/feketenevaludemugipubif.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/xodutoxujik.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_off0000816b.bin
ae68ffaba36b167bb3305a458c44478e2f901b70696d8a81a1fd9eab53522e9f
pdf-font-stream PDF embedded font (sfnt) at offset 0x816B 4952 bytes
font_01_sfnt_off0000921f.bin
7bcd5d794457718f1662b3e643415c24987427f964d8f21c14ceb37b2ad96e8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x921F 10576 bytes