Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0c1a2f08a551df…

MALICIOUS

PDF

44.5 KB Created: 2020-08-06 17:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34ac7316a1ea1c355d8bc4c4f4b4cb97 SHA-1: 177a5e6c95a936897687e6cabbb4b956f985629b SHA-256: fd0c1a2f08a551dfa0d719ed8786ac0b77595c6652fdc979961cb83bed85e873
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with one prominent link pointing to a known malicious redirector. The primary purpose appears to be SEO manipulation rather than direct user compromise, though the redirector poses a risk. No scripts were extracted, limiting the analysis of direct payload delivery.

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=protein+structure+determination+pdf
    • http://files.westernspringsbuilder.com/uploads/1/3/0/7/130740596/9e862.pdf
    • http://files.gardenspotrentals.net/uploads/1/3/2/6/132681938/finefenusavat.pdf
    • http://files.visiblegreenhome.com/uploads/1/3/0/7/130775623/45777a3a5f.pdf
    • https://cdn.shopify.com/s/files/1/0432/8875/6374/files/thematic_data_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/vukusevasuwel.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9786/files/rukegoxopum.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/nios_assignment_front_page_format.pdf
    • https://cdn.shopify.com/s/files/1/0440/5824/7320/files/vegetative_state_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/camscanner_license_creator_1._4_apk_cracked.pdf
    • https://cdn.shopify.com/s/files/1/0436/8809/9993/files/38831794187.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/21010662738.pdf
    • https://cdn.shopify.com/s/files/1/0431/2704/6301/files/swarm_robotics_a_formal_approach.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/accidente_de_trabajo_colombia.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/adventure_capitalist_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/35101907520.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068af.bin
75a8d3ed9b861d108861e27d36798566e25d6899a6fe843e046b75342106a6a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x68AF 5272 bytes
font_01_sfnt_off00007a86.bin
b405f504b49d3f9a9d434c3571d950c7b865eb8d60716dd4c9656ff2b1e28bc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A86 13348 bytes