Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6e0c132d28b916…

MALICIOUS

PDF

51.0 KB Created: 2020-08-01 20:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b645cfe1f4a40860c5792e0f1cc4ff40 SHA-1: 6e3d7f223222906199da4f28704b2d0d55bd2abd SHA-256: 4e6e0c132d28b916ee41fcbd53e9631a8f2cd16a62c5bf35aff3f24fb16af260
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=itextsharp+read+pdf'. The document body, though heavily obfuscated, contains this URL, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy, likely to improve search engine ranking for malicious content or to obscure the ultimate destination.

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=itextsharp+read+pdf
    • http://files.mayusilkart.org/uploads/1/3/1/3/131383664/2245704.pdf
    • http://files.reggieschivejazzcamp.com/uploads/1/3/0/9/130969809/67650ff.pdf
    • http://files.coronadohighschoolorchestra.com/uploads/1/3/1/4/131438324/2091eb6d557.pdf
    • http://files.sweetkittyanime.com/uploads/1/3/1/4/131407406/kijukurob.pdf
    • https://cdn.shopify.com/s/files/1/0437/6775/8997/files/country_way_sprayer.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3799/files/fajifolosaralura.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/wuxafolubaruwelenem.pdf
    • https://cdn.shopify.com/s/files/1/0437/0821/9547/files/gosapufusafosidikanelumid.pdf
    • https://cdn.shopify.com/s/files/1/0439/0787/4984/files/jumaduba.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/lefuwagabofemekimi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6497/3729/files/timukowupeb.pdf
    • https://cdn.shopify.com/s/files/1/0430/6917/8017/files/kededidifafapumije.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31903895201.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6415/files/tufiwibawebaropavirobotij.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4637/files/72257550485.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/2496780669.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/vesafarefuzejetoposazonup.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/
    • https://cdn.shopify.com/s/files/1/0437/6775/89

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008015.bin
c55ea6741be8998f3cd29be93ba96c4b7668c552cb18e00e3e94cc5c7da8a247		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8015 5104 bytes
font_01_sfnt_off00009173.bin
13a598b8d5ccb3ad7f1c4015d89dff509677b68274cfc041e00e8c96a0e29ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9173 14656 bytes

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