Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccde2d4ac90c68b9…

MALICIOUS

PDF

43.9 KB Created: 2020-08-12 20:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0cfd32a35dafcac61bd326ce5f5edd5a SHA-1: 1d93268718ac9876f4a1faac27c450417f23fd3a SHA-256: ccde2d4ac90c68b94b6eb643027cfde6876bafbd5e4f385da81191c9b9e9964b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a redirector (ttraff.cc) which is flagged as malicious. The document body also contains a large number of links to external PDFs hosted on Shopify, likely an attempt to manipulate search engine results and lure unsuspecting users. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of the malicious redirector URL is the primary indicator of compromise.

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=induction+motor+vs+synchronous+motor+pdf
    • http://files.jlkbodybutters.com/uploads/1/3/1/4/131408100/3e1a580b7448.pdf
    • http://files.osika.co.uk/uploads/1/3/1/4/131438639/496408.pdf
    • http://files.olgmidland.org/uploads/1/3/1/8/131856072/rovafip.pdf
    • http://files.astrologervaranasi.com/uploads/1/3/2/6/132682134/nagas_dekexibodevarus.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9426/files/linuxal.pdf
    • https://cdn.shopify.com/s/files/1/0428/5680/8615/files/arun_sharma_data_interpretation_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/npm_command_not_found_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/8634/7414/files/46063995805.pdf
    • https://cdn.shopify.com/s/files/1/0439/0102/6459/files/51213356191.pdf
    • https://cdn.shopify.com/s/files/1/0435/6397/4805/files/fe6_tier_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/dapuvitez.pdf
    • https://cdn.shopify.com/s/files/1/0430/3038/0698/files/jufobopekuv.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/kuwuxofubog.pdf
    • https://cdn.shopify.com/s/files/1/0433/8027/7406/files/63516782984.pdf
    • https://cdn.shopify.com/s/files/1/0428/4468/4454/files/fuzoririk.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/tuwabonepiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/2974/2246/files/16184586642.pdf
    • https://cdn.shopify.com/s/files/1/0437/6736/5794/files/juteguzesolowetujobug.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_off000062aa.bin
58022410a6ab74f3d364d5540af1b62435a2d38cdb4e8e12ed672ca803103a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 5016 bytes
font_01_sfnt_off0000738a.bin
b67ad99e4736e2c9b6e44a7d766473956a49262d4f50871502cef343f290955c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738A 9660 bytes
font_02_sfnt_off00009497.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9497 4324 bytes

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