Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1df2be398f3b52f…

MALICIOUS

PDF

43.7 KB Created: 2020-08-22 06:12:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09709e179c0f8a01601d500f7362b8ac SHA-1: 1f4fd86a786b756f893a35fdf1c886d136c4f5f1 SHA-256: e1df2be398f3b52f267fcbf0ae723117bbc5089d08798c78837d644b9ac22deb
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, containing numerous embedded URLs. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.com). The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same redirector URL, suggesting the primary intent is to lure the user to a malicious site.

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=list+of+travel+agents+in+delhi+pdf
    • http://files.athenasbyjoellen.com/uploads/1/3/1/3/131383426/gopewefunodofe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/lavaribuliwebor.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/konimemuxadejevenari.pdf
    • https://cdn.shopify.com/s/files/1/0431/1236/6231/files/benim_hocam_fizik_ders_notlar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/pitasodupamimuvilod.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/businessman_telugu_movie_songs_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0433/6356/5727/files/4674654924.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8369/files/63403576671.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/65743011358.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/union_budget_2020_download_upsc.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_off000066a4.bin
ac55f2aa3553a64b26eda44bb19bbd4afd33910bc12d9e81ecca34916b25fd3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A4 5304 bytes
font_01_sfnt_off000078ad.bin
92176da81ea7d37b770e28c53eeea63bbf8d5b061237a138f3eb066ff99b0613		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78AD 13264 bytes

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