Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f704ddd8690e9d6…

MALICIOUS

PDF

40.9 KB Created: 2020-08-25 16:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81e3e33838f62f8d3897db9c1fa5cec9 SHA-1: 33d2ca9c039c0bd17a956f2d239e6ed93b118418 SHA-256: 4f704ddd8690e9d64c6332dc900530ef2b9fa97578b63d00d794953e2755b23a
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=blackberry+bold+9900+os+7.+1'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to 'https://cdn.shopify.com/s/files/1/0432/1692/8923/files/zasifavodezuxibaluvugufis.pdf'. The document body, though heavily obfuscated, contains text fragments that, combined with the heuristic, suggest a lure for payment or invoice-related scams.

Heuristics 4

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=blackberry+bold+9900+os+7.+1
    • http://files.fredswansonbooks.com/uploads/1/3/2/8/132815123/3852127.pdf
    • http://sokebetu.wholereflections.com/uploads/1/3/1/6/131636725/fuxemujisudosidij.pdf
    • http://rupap.palladinohomeinspection.com/uploads/1/3/1/4/131406717/3ce555912cccb.pdf
    • https://cdn.shopify.com/s/files/1/0432/1692/8923/files/zasifavodezuxibaluvugufis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7211/9199/files/45084927698.pdf
    • https://cdn.shopify.com/s/files/1/0434/1848/4888/files/jujipujusi.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/63807200242.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/43986648409.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/concepto_alelopatia.pdf
    • https://cdn.shopify.com/s/files/1/0435/2265/4362/files/gymshark_nz_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/82796155572.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/suvowobalijol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6016/files/tepubexizimojuwal.pdf
    • https://cdn.shopify.com/s/files/1/0435/7318/2625/files/asfixia_mecanica_por_ahorcamiento.pdf
    • https://cdn.shopify.com/s/files/1/0450/9502/6840/files/anthropometric_data_for_interior_design.pdf
    • https://cdn.shopify.com/s/files/1/0435/3222/2615/files/avivamento_na_rua_azusa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1928/0288/files/gininowinotalojinofig.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_off00005f4c.bin
e6a0ff4a8db0a09dd4147c6e40a13ccafebf633151979c3987dea8276f4c7cb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4C 5752 bytes
font_01_sfnt_off000072f9.bin
41a710eeb4544afb820940fa878a4059d7f6f605b4c1331a52ffd1d4189b944d
pdf-font-stream PDF embedded font (sfnt) at offset 0x72F9 10456 bytes