Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc6b74f6fc142688…

MALICIOUS

PDF

35.8 KB Created: 2020-08-19 19:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd047d1faed866c79c0d7e4248983ddb SHA-1: 12eea7a498ca85cbc7f34bced6283d02d77b271c SHA-256: cc6b74f6fc1426883aa8ca7d72bf25f7b43f439eb562a480e096bea211b3f9e6
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a significant number of embedded links. One critical heuristic identified a redirector link to 'https://ttraff.cc/pify?keyword=augusto+cury+ansiedade+3+ciume+pdf', indicating a likely attempt to lure users to malicious content. The document body also contains this URL and numerous other Shopify-hosted PDF links, suggesting a link farm strategy. No scripts were extracted from this sample.

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=augusto+cury+ansiedade+3+ciume+pdf
    • http://files.midwestwomenssailing.org/uploads/1/3/0/9/130969772/a6a5719.pdf
    • https://cdn.shopify.com/s/files/1/0435/8127/6319/files/paragon_ntfs_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0428/4085/0598/files/xepodowije.pdf
    • https://cdn.shopify.com/s/files/1/0434/1153/8072/files/alimentacion_complementaria_oms_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/buzitike.pdf
    • https://cdn.shopify.com/s/files/1/0432/2384/2983/files/android_10_custom_rom_vince.pdf
    • https://cdn.shopify.com/s/files/1/0432/4635/4592/files/70927671682.pdf
    • https://cdn.shopify.com/s/files/1/0428/6647/5174/files/feral_druid_leveling_guide_bfa.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/47292265609.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8554/files/27924610816.pdf
    • https://cdn.shopify.com/s/files/1/0435/1839/4523/files/30822120698.pdf
    • https://cdn.shopify.com/s/files/1/0461/0955/6899/files/ammonium_formate_buffer_table.pdf
    • https://cdn.shopify.com/s/files/1/0431/8933/8276/files/wojidoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/59588685931.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_off00004bc9.bin
26ec1062eb84aef21a0dd2bffd5f157a39d4a92a5d1e51952db923f52b0d38cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BC9 5696 bytes
font_01_sfnt_off00005f26.bin
6c2ea1901e299962d75d4bd437f291767703062c2b73977dd3f768eb150f56aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F26 10304 bytes