Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be9d6eb8d43386c…

MALICIOUS

PDF

55.5 KB Created: 2020-08-18 16:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce208e374f7b3f37b29e16e22398e769 SHA-1: e5ee8b2c1e0cb0c5bc8597c30a13c15bfa192377 SHA-256: 5be9d6eb8d43386cc52631fe1a075acaefb996055dc627df8ab0a91cee3224ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.ru), indicating a malicious intent to lead users to harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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=baghban+rab+hai+baghban+song+ming
    • http://wigado.herothrillshow.org/uploads/1/3/1/4/131437736/butunivit-rutotekewu-bogikobi.pdf
    • http://files.ahs-bully-blockers.org/uploads/1/3/2/3/132303219/lawaja_tofagaripobov_renadexarif_pebowi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/3397/7255/files/bekuwujenuzezabuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/fujegomuzuga.pdf
    • https://cdn.shopify.com/s/files/1/0434/4214/3397/files/lenzie_meadow_primary_school_inspection_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/80911173779.pdf
    • https://cdn.shopify.com/s/files/1/0449/0467/7543/files/atar_notes_business_studies.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/74165964200.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/43941982963.pdf
    • https://cdn.shopify.com/s/files/1/0428/6545/9366/files/acer_x1110_dlp_projector_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/delegation_of_authority_form_sample.pdf
    • https://cdn.shopify.com/s/files/1/0449/6962/3711/files/deformed_baby_in_call_the_midwife.pdf
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/farumidesibixuduzotenop.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/6003/files/xokusixodutodoxajo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/nodamuwum.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_off0000839a.bin
c060645f12c8947ec155f6155751522a9e56839ae8244f3aaa03805ae88006a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x839A 4844 bytes
font_01_sfnt_off000093c6.bin
0dd56b354ce612761275456b1c0a522a115fbc304440f096559339b76eb71594		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93C6 14436 bytes
font_02_sfnt_off0000c114.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC114 4324 bytes

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