Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8753b0bc8f913b…

MALICIOUS

PDF

45.0 KB Created: 2020-08-29 22:27:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec93a43c296cca2f78d1dd0442b5aa60 SHA-1: 81df7040a1d818cd2a1d9bfd925f5720b75c7954 SHA-256: 0d8753b0bc8f913b4a6f807c66626d2b18f1e6c0ba13b8e33ce0116ddd978809
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into visiting a malicious site. The presence of numerous other PDF links, flagged as a 'link farm', further supports the malicious intent of directing users to external content, likely for malicious purposes.

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/wix?keyword=julius+caesar+mark+antony+speech+analysis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2156/4066/files/61647558796.pdf
    • https://cdn.shopify.com/s/files/1/0427/8062/3015/files/15114313360.pdf
    • https://cdn.shopify.com/s/files/1/0433/1274/2564/files/canadian_food_guide_servings_per_day.pdf
    • https://static.usrfiles.com/ugd/a4e402_a39346c3c1294cee83be57fa1637f0c6.pdf
    • https://static.usrfiles.com/ugd/9ea91e_e06850d2f1d84f94b7c709e49c7b203b.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/lafavezufalalifet.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/kujirokuwomipivixafugogi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8580/files/56636024455.pdf
    • https://cdn.shopify.com/s/files/1/0440/4533/6726/files/lixuzajimok.pdf
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/english_standard_version_bible_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0452/3737/1037/files/another_day_of_sun_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0439/4139/6638/files/xafipumune.pdf
    • https://cdn.shopify.com/s/files/1/0431/7505/1424/files/12990349578.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4885/files/miligijofafisexa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007299.bin
62f8295c7d345d5ce98beceecf791b80b86c170c467a9d81d081cda2323aa707
pdf-font-stream PDF embedded font (sfnt) at offset 0x7299 5328 bytes
font_01_sfnt_off00008491.bin
95b3fabb9af34e3a108afa342a9f7f6c15fc3164418383081f8795ef6eabdcfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8491 10192 bytes