Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a9affdb64d2d1a7…

MALICIOUS

PDF

38.3 KB Created: 2020-08-04 01:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61c7fc616eb8509e534038c30d52330a SHA-1: 3a341a255287d2c12a04af7b948acbe57041f30e SHA-256: 4a9affdb64d2d1a771818f933fecfd4790169f1caee98b243e8e0aa676555bba
120 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, disguised as a cardiovascular risk calculator. This is a common social engineering tactic to trick users into clicking malicious links. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting an attempt to obscure the malicious redirector. No scripts were extracted, limiting the analysis of further malicious behavior.

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=australian+cardiovascular+risk+calculator+pdf
    • http://files.stlvacancy.com/uploads/1/3/1/4/131407761/murovafakokiva.pdf
    • http://files.fancyutahyorkies.com/uploads/1/3/0/7/130775734/lamoriw_vuzapase_gadaj.pdf
    • http://files.batterseamirroremporium.co.uk/uploads/1/3/1/3/131379249/tozugojegikalide.pdf
    • http://files.thelasalleclub.com/uploads/1/3/1/1/131163736/54f7907d65433d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/demotufilonameviv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6149/files/62711775599.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/dujekuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/gojiwaveruruxizipudef.pdf
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/3038056684.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62654677968.pdf
    • https://cdn.shopify.com/s/files/1/0431/4634/6657/files/94459349072.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/47181628393.pdf
    • https://cdn.shopify.com/s/files/1/0431/2127/9138/files/kojevoxutaravuxizevesobo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1488/1433/files/tipiwosazawefojanekati.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_off0000573b.bin
043cff8d4b143b8aee3c9cd11d00eaf22d7619f354d0dd2136251ab7ba36df59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x573B 5264 bytes
font_01_sfnt_off00006937.bin
793be8416b9daf32beb03fe2a25a4e3cc79ce0ad83d04c4441e9cd2fb978bd84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6937 10376 bytes

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