Malicious PDF — malware analysis report

Static analysis result for SHA-256 105a63bc4c019533…

MALICIOUS

PDF

48.2 KB Created: 2020-08-09 13:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d736af12f497129e4b2450103ddf289f SHA-1: 23407e9548e749391bf122e33e9fe48c519b5a6b SHA-256: 105a63bc4c019533fadf0701ee702d50676aa58c7adc96640f6e358f33e5bc6e
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is also present in the document body. This, combined with the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic, indicates the document is designed to trick users into visiting malicious sites, likely for financial gain. The PDF structure and embedded links suggest it's part of a link farm intended to improve SEO for scam content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=elements+of+statistical+learning+pdf+download
    • http://wakakod.btcjp.co/uploads/1/3/1/6/131606289/zujel.pdf
    • http://files.chloe-po.com/uploads/1/3/1/1/131163599/7119114.pdf
    • http://lejenuk.juliaharrison.net/uploads/1/3/1/4/131407164/tizebepowexu-wuburiki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/veditebusov.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/46185626236.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/8259226897.pdf
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/dujigotamuxebulumijezonuk.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3298/files/amando_a_pablo_odiando_a_escobar_libro.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/92823847656.pdf
    • https://cdn.shopify.com/s/files/1/0434/7107/7542/files/divatinuvuligowixupinam.pdf
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/66764148955.pdf
    • https://cdn.shopify.com/s/files/1/0439/2534/0328/files/mechanical_engineering_projects_on_heat_exchanger.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/lefevunexatunudatixovuzom.pdf
    • https://cdn.shopify.com/s/files/1/0438/4079/8885/files/zubivefirixodokidarole.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/lefomexufe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/6542468105.pdf
    • https://cdn.shopify.com/s/files/1/0450/3424/2198/files/functional_groups_in_chemistry.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_off00006e77.bin
e8d33d755f018f34cd3fbf21bd83e2704f13f969dac3dbf06a249e6bc016b341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E77 5312 bytes
font_01_sfnt_off0000807a.bin
24338b217882b64a38fd22370d20a5350794fdbd9182e7aa983435f08b05ffdf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x807A 10856 bytes
font_02_sfnt_off0000a58e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA58E 4324 bytes

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