Malicious PDF — malware analysis report

Static analysis result for SHA-256 1411c33f0733c2d0…

MALICIOUS

PDF

45.0 KB Created: 2020-08-19 20:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa05f32337bcc9cc9a2f2c56972cf2f9 SHA-1: fa8e8f5647eb98b835208f036726b6b6d8290623 SHA-256: 1411c33f0733c2d08c2fa03162f702921397b46a742f0e96949328fa21e89904
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to Shopify-hosted PDFs with numeric slugs, a common tactic for SEO poisoning or distributing malicious content. One prominent URL, 'https://ttraff.ru/pify?keyword=alyosha+the+pot+pdf', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to these URLs, suggesting an intent to drive traffic to potentially harmful sites.

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.ru/pify?keyword=alyosha+the+pot+pdf
    • http://files.steinlecounselingservices.com/uploads/1/3/1/3/131398188/rojevuzafi-xekajuf-rurosonopuf.pdf
    • http://files.tillamookschoolofdance.com/uploads/1/3/1/4/131407061/fifebax.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/28924793974.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/vetuluzexumimon.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8951/files/gigodefapijade.pdf
    • https://cdn.shopify.com/s/files/1/0430/8176/0935/files/steve_jobs_aaron_sorkin.pdf
    • https://cdn.shopify.com/s/files/1/0435/2367/0176/files/sbi_corporate_credit_card_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/konodonagufimomoweres.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/kinobody_superhero_bulking_program_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8674/9604/files/sakitotowepeligusawopelof.pdf
    • https://cdn.shopify.com/s/files/1/0428/8492/3555/files/29003051014.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0165/files/ordinal_numbers_practice.pdf
    • https://cdn.shopify.com/s/files/1/0434/4738/6262/files/historia_de_antigona.pdf
    • https://cdn.shopify.com/s/files/1/0434/5593/8725/files/derivatives_markets_mcdonald_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0432/1673/2315/files/biblical_meaning_of_dreams_and_visions.pdf
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/guardian_druid_icy_veins.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_off0000696f.bin
ff7414be61a79478d7e35038c9d9c30c18fbb7a89dbb8734f077bea624c59405		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696F 4760 bytes
font_01_sfnt_off000079b3.bin
11cbabba66bc3d7bc5f005498bcb4758c3693dc0ebe6e04178cb88a04f65212b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79B3 9240 bytes
font_02_sfnt_off0000992c.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x992C 4324 bytes

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