Malicious PDF — malware analysis report

Static analysis result for SHA-256 7678d2d3b78b0e77…

MALICIOUS

PDF

48.4 KB Created: 2020-08-29 06:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c783a06ef46ece1a487ef688863b3e4c SHA-1: a677d44980b0db8dabf6eed7f4caeb5af461d752 SHA-256: 7678d2d3b78b0e77985aa68738356277943aabd6167659e9ef78699ad65386a8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm with 26 external PDF links, one of which, https://ttraff.cc/wix?keyword=ghajini+t%25C3%25BCrk%25C3%25A7e+altyaz%25C4%25B1l%25C4%25B1, is a known malicious redirector. The document body itself is heavily obfuscated and appears to be a lure, likely related to the Turkish phrase 'Ghajini Turkish subtitles'. The presence of numerous benign-looking Shopify links suggests an attempt to disguise malicious activity within a larger set of URLs.

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=ghajini+t%25C3%25BCrk%25C3%25A7e+altyaz%25C4%25B1l%25C4%25B1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2937/0779/files/yomawari_midnight_shadows_trophy_guide_and_roadmap.pdf
    • https://cdn.shopify.com/s/files/1/0448/4320/4765/files/memorex_cd_lablemaker.pdf
    • https://cdn.shopify.com/s/files/1/0432/2299/1007/files/cancer_genetics_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/4169/9478/files/zufifupepawisovave.pdf
    • https://cdn.shopify.com/s/files/1/0437/2067/1386/files/72259434945.pdf
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/instinct_pet_food_feeding-_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/2986943921.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/section_351_statement.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2557/files/67854441403.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/42069246192.pdf
    • https://static.usrfiles.com/ugd/b8c837_a817384f4a3c4bf39c1c9ee3421b6721.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5d4cabc4dc1441cb65d253a026401b7.pdf
    • https://static.usrfiles.com/ugd/b8c837_7e25e3486ca94c258ba1421874a4e8f6.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c59.bin
a7e14ff346aba698aa1a11ff41c9994ecac8fc8715f2aebdb286effa9da5dd1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C59 10196 bytes
font_01_sfnt_off00007d87.bin
3c4aca61697a926f43475cb66a41bd31125a5274914102524b0474b62f5bc777		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D87 5252 bytes
font_02_sfnt_off00008f41.bin
c38124985f3d99ba23a1cf9186f9817c25fc3a65e235ffe53f59e82aeb7b9ca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F41 11292 bytes

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