Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a16da6e1b54f972…

MALICIOUS

PDF

45.5 KB Created: 2020-08-07 15:48:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c993f1b5f4d9105a9193a74d548e640d SHA-1: 768628c9b799b01c7e314ad1c983747f973cb811 SHA-256: 1a16da6e1b54f972104679f2a4cf4da8167832d9d15d94e152125c68491e228a
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.001 PowerShell

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to PDF conversion and a URL that appears to be part of a link farm. The heuristic findings indicate the PDF is designed to redirect users to malicious infrastructure and uses social engineering tactics like urgency and a lure to install browser extensions. No scripts were extracted, but the presence of numerous links and the redirector heuristic strongly suggest a phishing or malware delivery attempt.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=convertir+pdf+en+autocad+online+gratis
    • http://files.pippayoga.co.uk/uploads/1/3/1/4/131453177/sotasevev.pdf
    • http://files.karenjoyce01.com/uploads/1/3/1/4/131483097/buzaji.pdf
    • http://files.hsiensw.com/uploads/1/3/1/3/131382274/b516fe.pdf
    • http://files.northportcarpet.com/uploads/1/3/0/9/130969440/wakarutubixen.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8726/files/wiwarutemaraturutikeni.pdf
    • https://cdn.shopify.com/s/files/1/0435/1436/4059/files/2896739046.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/pawute.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/14134988854.pdf
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/bedawijoma.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/xuxetidogawolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/19600644824.pdf
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/associao_mista_de_resistores_exercicios.pdf
    • https://cdn.shopify.com/s/files/1/0433/7238/0310/files/rivepofelopadixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/94581853586.pdf
    • https://cdn.shopify.com/s/files/1/0431/0348/6103/files/fisonewolejorironozatoxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/zawupalavixuritiketip.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_off00005d29.bin
edb9a34d636b30a7bd6c55989cbe6178ac17ae58acf747f997eb1634982b7660		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D29 5288 bytes
font_01_sfnt_off00006f40.bin
9d36cf66a8473997d19d626373b5957d1d52260b3c4d90d2e2d2d01a7431d723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F40 10840 bytes
font_02_sfnt_off000093cb.bin
3088de61ba4d2b01ab234d84e40a42107c4d30a52b1b9bdaf8961d49da71d313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93CB 16076 bytes

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