Malicious PDF — malware analysis report

Static analysis result for SHA-256 3266f127849a0024…

MALICIOUS

PDF

49.1 KB Created: 2020-08-17 14:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1694888faecbd8a2d11686ad0aba3385 SHA-1: 8c9cf9d34d61a15b70ad6e66afc4df82e56d6342 SHA-256: 3266f127849a002472cf3e544710189d4ee4906f36c3ae946261ba34560e439e
152 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many of which point to a redirector service (ttraff.com) known for malicious activity. The ML classifier also strongly flagged this PDF as malicious. The document body contains garbled text but includes the suspicious URL, suggesting a lure to a malicious site. The presence of a link farm and a malicious redirector indicates an attempt to lead users to potentially harmful content.

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.com/pify?keyword=aimil+amyron+syrup+information
    • http://files.belinktrans.info/uploads/1/3/0/8/130874317/doxijefopajavo.pdf
    • http://files.bestgambling.co.uk/uploads/1/3/0/7/130738701/firagalitapat.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/baginuzolexab.pdf
    • https://cdn.shopify.com/s/files/1/0433/0674/6011/files/bohemian_rhapsody_tab.pdf
    • https://cdn.shopify.com/s/files/1/0437/2054/0310/files/salmon_fishing_oregon_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/0524/6631/files/96199586469.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/lol_sylas_guide_german.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/power_amplifier_circuit_design.pdf
    • https://cdn.shopify.com/s/files/1/0448/7122/1410/files/anatomy_of_monocot_stem.pdf
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/zidekoxosajedimus.pdf
    • https://cdn.shopify.com/s/files/1/0432/4121/0011/files/simple_past_tense_irregular_verbs_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/fijiweb.pdf
    • https://cdn.shopify.com/s/files/1/0436/4189/7113/files/75626797731.pdf
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/50929264522.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006783.bin
1013cb0d95f8d2f362c22a33f8f0756bb4bde6faffc5f4ec3293692f31af73a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6783 5140 bytes
font_01_sfnt_off000078f0.bin
9f3709f909e7e0943ebdab921ba12ccbf266709a49ec58e5ad206ddf500fe445
pdf-font-stream PDF embedded font (sfnt) at offset 0x78F0 12912 bytes
font_02_sfnt_off0000a234.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA234 16164 bytes