Malicious PDF — malware analysis report

Static analysis result for SHA-256 c484c4269ab06db2…

MALICIOUS

PDF

47.5 KB Created: 2020-08-08 21:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c611881d93767635c97a64802a0490b0 SHA-1: 375eb9a9adfb6e78c780fcb6a043f20b944dd00a SHA-256: c484c4269ab06db23b3c4c0d47d379dc816fca065c753cb0e870da8d89487890
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, forming a link farm designed to distribute traffic. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.cc/pify?keyword=clinical+pharmacy+roger+walker+pdf. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on various domains, many of which are likely part of the same distribution network. This indicates a likely phishing or malware delivery attempt.

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=clinical+pharmacy+roger+walker+pdf
    • http://files.mrshaughaboo.com/uploads/1/3/1/4/131438869/1241ef1b66.pdf
    • http://files.cactusmoonshine.com/uploads/1/3/2/8/132814166/300c70ab.pdf
    • http://files.waubonsiedanceteam.com/uploads/1/3/1/8/131872269/senujadadeziki.pdf
    • http://files.alexisoneill.com/uploads/1/3/0/7/130776728/kulipegudetel.pdf
    • http://files.allsaintsnsblackrock.com/uploads/1/3/0/8/130815228/ce1b4c969e.pdf
    • https://cdn.shopify.com/s/files/1/0439/5306/2043/files/jutufuxerufejoxiwuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/xifoguzotazem.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/22148577984.pdf
    • https://cdn.shopify.com/s/files/1/0435/4555/9189/files/est_to_utc.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/93133114028.pdf
    • https://cdn.shopify.com/s/files/1/0431/5434/2042/files/mercedes_factory_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9000/1572/files/neduzodik.pdf
    • https://cdn.shopify.com/s/files/1/0437/2771/6520/files/canon_lide_220_specs.pdf
    • https://cdn.shopify.com/s/files/1/0439/0476/2011/files/nalesizabexolaxitukitagew.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/thiruttuvcd_telugu_movies.pdf
    • https://cdn.shopify.com/s/files/1/0427/8291/6767/files/degepedozaramewufi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2373/6725/files/sixozulumazifaxunubo.pdf
    • https://cdn.shopify.com/s/files/1/0434/8923/1000/files/retomat.pdf
    • https://cdn.shopify.com/s/files/1/0433/7195/4334/files/dagisizuxodemi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000083f0.bin
07d46aeb64ede995b1b7381afb636ca3b3038de6d368fec48e9849bf41fa58d4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x83F0 18948 bytes
font_00_sfnt_off0000511e.bin
65fb74ee6a33ebfadb6cb0af889e7c322cd70d4ea4596f8bad5a31bba850fd8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x511E 5380 bytes
font_01_sfnt_off00006340.bin
bd07d61c163a46a7f2331120631e227a4b1995941277c066eccafc656504d257		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 9496 bytes
font_03_sfnt_off0000a248.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA248 4324 bytes

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