Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f494bcf73f9994c…

MALICIOUS

PDF

40.2 KB Created: 2020-08-25 05:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f429938fcf6549d1683b868d34f60f1 SHA-1: 6343206e225d2ec08104e5b70418aec93c794657 SHA-256: 7f494bcf73f9994ca4d42178eb22b0d24693ffb3c7a0d12b670aa52e1cc8b797
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF link farm heuristic, with many links hosted on cdn.shopify.com, one of which is a PDF file. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=how+to+archive+chat+whatsapp+android' and text suggesting urgency and MFA lure, consistent with phishing attempts.

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=how+to+archive+chat+whatsapp+android
    • http://files.woodstovekitchen.com/uploads/1/3/0/8/130814063/fajopajisaw.pdf
    • http://files.senoramoore.com/uploads/1/3/0/7/130775308/ec479e9c0f802.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8248/files/android_watch_phone_samsung.pdf
    • https://cdn.shopify.com/s/files/1/0431/4690/3701/files/fokak.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/zaserinotupijutulo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7591/1321/files/kaboledug.pdf
    • https://cdn.shopify.com/s/files/1/0444/1587/7286/files/blood_pressure_ranges.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/vevixid.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/31590289477.pdf
    • https://cdn.shopify.com/s/files/1/0434/7537/0136/files/73561091409.pdf
    • https://cdn.shopify.com/s/files/1/0437/4478/8634/files/pobufazoxuropuzefi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7266/8319/files/xovuremuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7737/6936/files/62771436521.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/didozex.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/49683397526.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_off00005e5d.bin
f04db9651331ad2ac240a2802743035d3c12fed79c723687dd9ca44ca6d13ecc
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5D 5240 bytes
font_01_sfnt_off0000703b.bin
fc9e61fbad9d6b8f00acb8d6bf13651784289c5c8469a32a2cbe6939c7806097
pdf-font-stream PDF embedded font (sfnt) at offset 0x703B 10384 bytes