Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce1d49abbbc5bfa5…

MALICIOUS

PDF

45.1 KB Created: 2020-08-09 19:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c906bc7b26e94109345d0713fdc8fd0a SHA-1: f942221ddaa5d2e2784214c1d37577fe77aa3976 SHA-256: ce1d49abbbc5bfa5db0abfc6389865197db957c3b4cf8c3430e57e404423e887
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The document body text, though heavily obfuscated, contains the target search query 'autocad map 3d import pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a large number of external PDF links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=autocad+map+3d+import+pdf
    • http://files.maeveleslie.com/uploads/1/3/2/8/132815008/vibogegowuna.pdf
    • http://files.thesyncretistrealm.com/uploads/1/3/1/1/131164168/viben.pdf
    • http://files.flipconsultants.com/uploads/1/3/2/7/132712088/5727370.pdf
    • http://files.sloreunion1969.com/uploads/1/3/1/3/131384414/1819949.pdf
    • https://cdn.shopify.com/s/files/1/0440/0647/3886/files/fitavuzaligisakek.pdf
    • https://cdn.shopify.com/s/files/1/0431/8219/4852/files/17430883132.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/33640518819.pdf
    • https://cdn.shopify.com/s/files/1/0431/3205/9810/files/68800365162.pdf
    • https://cdn.shopify.com/s/files/1/0437/2509/5062/files/87094800904.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/pavin.pdf
    • https://cdn.shopify.com/s/files/1/0437/4901/5713/files/82082937057.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/dukarujofojufelifigoko.pdf
    • https://cdn.shopify.com/s/files/1/0447/5063/5162/files/cricut_crv001_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22537170944.pdf
    • https://cdn.shopify.com/s/files/1/0436/3635/9326/files/jebil.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3934/files/63886198401.pdf
    • https://cdn.shopify.com/s/files/1/0427/8494/8380/files/jilulilalesapevo.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_off00006778.bin
356746adb4402d40cef92d9958e46592405bbf988e78b4a0f09a56a337ca06fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6778 4900 bytes
font_01_sfnt_off00007820.bin
8cfbccf9dae29d0e7df4cf5f3c74b97934d4a5175ccfb7c5aa418a5631e62647		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7820 9740 bytes
font_02_sfnt_off0000996f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x996F 4324 bytes

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