Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad62bb5b9fa25122…

MALICIOUS

PDF

40.6 KB Created: 2020-08-12 16:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca93dfbbddaaed7fde0a161c2aae457d SHA-1: 991903ec09fd7f34ca77c2bba1b058d2beeba461 SHA-256: ad62bb5b9fa25122e3e6878f46a02f6f3d3ea3383fe8f127538811c06b20e588
128 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a helpful resource for converting PDF to Word, which is a common social engineering tactic. This link, 'https://ttraff.cc/wb?keyword=cara%20memindahkan%20pdf%20ke%20word%20gratis', is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, but several others to potentially malicious domains. The presence of a 'download button' heuristic further supports the lure of downloading malicious content.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=cara%20memindahkan%20pdf%20ke%20word%20gratis
    • http://ziravi.morfarise.com/uploads/1/3/1/4/131483281/nelijuzolovo_tidelinuzufukum_natonub_vonuxapu.pdf
    • http://satukuf.judithviskerart.com/uploads/1/3/2/8/132816202/3616469.pdf
    • http://files.iabsconvention.com/uploads/1/3/2/6/132681513/genikoza-pizubarof-wewir.pdf
    • https://cdn.shopify.com/s/files/1/0428/4999/2860/files/80606054097.pdf
    • https://cdn.shopify.com/s/files/1/0435/8271/8107/files/6714029950.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/70974892449.pdf
    • https://cdn.shopify.com/s/files/1/0436/8406/9526/files/lirobufizakunijur.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/wuwaxegikusiwiwof.pdf
    • https://cdn.shopify.com/s/files/1/0429/5193/4108/files/balanced_diet_chart_for_12_year_old_child.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/go_kart_designs.pdf
    • https://cdn.shopify.com/s/files/1/0435/9087/7339/files/pisuw.pdf
    • https://cdn.shopify.com/s/files/1/0450/2025/0262/files/wafuwilojebujamugasefij.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/mofatogopubivote.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/puluven.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_off00005feb.bin
ac9fabc490ceae359bdfc170b223f7b4382d654dc8b2794b7e6d103757198fd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEB 5484 bytes
font_01_sfnt_off0000727b.bin
c07dc3d7543794fe04693e150feb44f44d43c5a622445f26b11e71f29cd01e74
pdf-font-stream PDF embedded font (sfnt) at offset 0x727B 10128 bytes