Malicious PDF — malware analysis report

Static analysis result for SHA-256 d72fa56bc97af39c…

MALICIOUS

PDF

40.0 KB Created: 2020-08-29 06:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2203a2aa06f24a78afb8f5c125021c9 SHA-1: 77e85dacc3385eff84afc8f3312c6fc3ad04795f SHA-256: d72fa56bc97af39ce98a8f604894174a99d9b8893e8ddb2d12575c2607cf1cfa
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=texas+instrument+ti+30x+iis+manual'. This URL is presented within the document body, disguised as a calculator manual. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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.ru/wix?keyword=texas+instrument+ti+30x+iis+manual
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/arsenal_vs_san_lorenzo_formacion.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/85064420127.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/kaputegatoreramun.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/46142370885.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/kadamokowufatabigax.pdf
    • https://static.usrfiles.com/ugd/b8c837_61606fcdfd534038ab0ee0893f09605f.pdf
    • https://static.usrfiles.com/ugd/b8c837_28fac90fa32549fab076ee66f0d9fae5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5b6a29070d0c43aa9f44571a57d7eb6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2a34f99e45c4631a1cac9d382272220.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1685/files/algernon_blackwood_the_empty_house.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/84799868155.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/mawedexajajefem.pdf
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/jipumatitinumaxadibaxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4466/files/vomubodonadixuwoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18983443830.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/checklist_template_for_excel.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/kudog.pdf
    • https://cdn.shopify.com/s/files/1/0450/4974/1464/files/eidetic_memory_training.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_off00005e04.bin
237bc61ba7d0a722ee55f8c19c3bfa406bf12fa1b8f3a99149b37f9d4d9f9e11
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E04 5156 bytes
font_01_sfnt_off00006f72.bin
41e8f2cb07499e4ebc88f8fd66490d8b8e5b401410e0264c4c98ccdbba13015c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F72 10432 bytes