Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5363851346cae9c…

MALICIOUS

PDF

46.9 KB Created: 2020-08-31 01:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef485df10032414b087240a7b524367c SHA-1: d38d2fef7fcd25b2713c9846e38ce6d7a8dcb61e SHA-256: f5363851346cae9c47ac7bcea96169c61a54ff6101b045d888a729551302c2ae
152 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, designed to appear as a product page for Samsonite replacement wheels. One of these links, https://ttraff.cc/wix?keyword=samsonite+replacement+wheels, is identified as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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/wix?keyword=samsonite+replacement+wheels
    • https://cdn.shopify.com/s/files/1/0436/2331/7662/files/56604600485.pdf
    • https://cdn.shopify.com/s/files/1/0435/6649/7960/files/full_hd_1080p_telugu_movies_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/58842975679.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0666/files/27864360997.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9648/files/dragnet_logical_reasoning_past_questions.pdf
    • https://cdn.shopify.com/s/files/1/0430/7596/0985/files/xnxx.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/international_dependency_theory.pdf
    • https://cdn.shopify.com/s/files/1/0437/0402/5243/files/pokemon_black_2_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/28859705231.pdf
    • https://cdn.shopify.com/s/files/1/0435/3844/8548/files/peter_pan_collar_necklace_template.pdf
    • https://static.usrfiles.com/ugd/c1108c_dad2342ad1264100bab45e64c373018f.pdf
    • https://static.usrfiles.com/ugd/1d64af_a0dc7548380446cab191b048122a41e2.pdf
    • https://static.usrfiles.com/ugd/f7fbc8_9ffd552e05224b4c81ff45f79c9fef05.pdf
    • https://static.usrfiles.com/ugd/b8c837_5784fc09946c43cf9efc5ff985258230.pdf
    • https://static.usrfiles.com/ugd/b8c837_40d955db258743aca8a77424d677199c.pdf
    • https://static.usrfiles.com/ugd/850f07_5572e15d0b0d4ae68f58b4d27a9b5d86.pdf
    • https://static.usrfiles.com/ugd/15cd4d_6f12f99ff48e4a1c9f7d7d2ce735dafc.pdf
    • https://static.usrfiles.com/ugd/91e123_5b06d68084c240219bb93ff8d2cad2a9.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_006_off000082d8.bin
248d4f58f1eef18157070fa2005089e1fa583982bfb59126000e361b2e655828		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x82D8 18516 bytes
font_00_sfnt_off00004e3d.bin
8918c70791fc2d7d0d9accc64878fc1f99a79e5157130964dd73d7efd7295eb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E3D 5156 bytes
font_01_sfnt_off00005f90.bin
6aea4d1b4dabdf4d35837646534b40e8b11992ba3f06e8d533b0e5c9070f2c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F90 10776 bytes
font_03_sfnt_off00009f70.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F70 4324 bytes

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