Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa79848749aad839…

MALICIOUS

PDF

47.1 KB Created: 2020-08-14 21:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5747ef5d88e24ace5d1fb33f173902b0 SHA-1: fb4e3502a557c862b0023ade8a33848ace40816c SHA-256: aa79848749aad839fa2940144b58934b774e2a8b37182b66f88197022270c781
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body text, though heavily obfuscated, contains the target URL 'https://ttraff.ru/pify?keyword=debussy+syrinx+sheet+music' and other PDF links. This suggests the document is designed to trick users into clicking malicious links, likely leading to further malware downloads or phishing attempts.

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.ru/pify?keyword=debussy+syrinx+sheet+music
    • http://files.theatrere.co.uk/uploads/1/3/0/7/130740483/fovaximu.pdf
    • http://fojasigo.cdelcurto.com/uploads/1/3/1/4/131407406/nafabezubuwu.pdf
    • http://xudewinu.ccharrogate.com/uploads/1/3/1/4/131409090/korip.pdf
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/6570311058.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/15695720610.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/luwigitudavezetoverawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1126/7990/files/97207110071.pdf
    • https://cdn.shopify.com/s/files/1/0433/0058/5636/files/ganagekin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/viruxirekosarobavogerij.pdf
    • https://cdn.shopify.com/s/files/1/0435/9772/5864/files/21089456941.pdf
    • https://cdn.shopify.com/s/files/1/0436/8783/7849/files/solution_book_of_thomas_calculus_12th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/7009/5521/files/xuzefu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/81120175937.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/vamalepejegozaka.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/xitowupojevi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006311.bin
ab3d65f1dbf5ff7dfb71bf16ccb046a21b106e762d819ec3dc7454fa43461e75
pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 4880 bytes
font_01_sfnt_off0000737f.bin
18d9a109afcb6f3e4a3fa68028e91ce2f47cab739172544ab4dc4092b6daef49
pdf-font-stream PDF embedded font (sfnt) at offset 0x737F 14656 bytes
font_02_sfnt_off0000a171.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA171 4324 bytes