Malicious PDF — malware analysis report

Static analysis result for SHA-256 dad7b8539b8f1d17…

MALICIOUS

PDF

41.9 KB Created: 2020-08-19 02:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0573644e334b1699c35f1da64d48336e SHA-1: 3ff9aed796de92155098694fdb10abb91ca1a765 SHA-256: dad7b8539b8f1d17f7aa18ce6e46af633e930a5c7428d8f8b376b535ae57fa6a
128 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text that suggests a lure, such as 'huf affidavit format pdf', and a call-to-action phrase is also detected. The presence of a link farm and a malicious redirector indicates a phishing or malware distribution attempt.

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=huf+affidavit+format+pdf
    • http://files.harvestministriesfl.org/uploads/1/3/0/7/130739747/6889291.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/12973613156.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vakijuxek.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/mugesezola.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/monazata.pdf
    • https://cdn.shopify.com/s/files/1/0434/7478/0312/files/24475258454.pdf
    • https://cdn.shopify.com/s/files/1/0431/3831/8487/files/4377490755.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3018/files/45432222124.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/zoxuzadujizafejarol.pdf
    • https://cdn.shopify.com/s/files/1/0431/5470/2496/files/danijikodanukonodakofuzi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/xavigavepezir.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/jeopardy_online_test_answers_2019.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_off00006640.bin
43f9b343d258915b661d0a43f7b8705bcc877aeb96a2f8df54ec736e92e2ab74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6640 4996 bytes
font_01_sfnt_off0000772c.bin
d6c2f0408f6c46e7984177d19c1d64f16278dc90b01c4ad4c6abe392e9febd36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772C 10468 bytes

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