Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb12488e02d20db…

MALICIOUS

PDF

51.1 KB Created: 2020-08-28 22:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 144f8b85497ec011af52865b051ab3c2 SHA-1: 6d709018e0ceca2855e5091e48265077e24186ea SHA-256: bdb12488e02d20db368f3ce084e71dfb6d8a2c13c580c7fab0e74722f2f02f16
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious due to its inclusion of a redirector link to known malicious infrastructure, specifically 'ttraff.cc'. It also contains a large number of external PDF links, suggesting a link farm designed to manipulate search engine results or lure users to download files. The document body contains text related to 'Mahabharata sanskrit pdf free download', indicating a lure to attract users searching for such 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.cc/wix?keyword=mahabharata+sanskrit+pdf+free+downlo
    • https://static.us
    • https://static.usrfiles.com/ugd/b8c837_f93452b4e75f4affa44ca5eb0e7cccdf.pdf
    • https://static.usrfiles.com/ugd/b8c837_e285629aa57b4869b8e57c127a89b030.pdf
    • https://static.usrfiles.com/ugd/b8c837_275cda56b0994275b542f2aee5bec5c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_65061ddcc2a14518bc7b47bbc370ada7.pdf
    • https://static.usrfiles.com/ugd/b8c837_777f775b845b4d4dacec14420ea13f7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_95420d694e0a40de886ba18e1d17b003.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4d5a6f8fc114c37a8460fbd3a5fed15.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a24cee329544235af70991f2c28d87c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ceefa6617de046cab9af5e0a9b652215.pdf
    • https://static.usrfiles.com/ugd/b8c837_e152ae9b6e3b4857980a9bbd5936e161.pdf
    • https://static.usrfiles.com/ugd/b8c837_14a25d68ba944863b75be45b38f4838e.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ad786902dad40529b6f5a4242697e70.pdf
    • https://cdn.shopify.com/s/files/1/0430/9083/7655/files/canzoniere_accordi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/22901202063.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/gotoxilidobexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/15678188293.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_off00006e07.bin
ff6d37e1d1f4de28d619310150bd1a6dce23236cf82a9136b069df8e58c86f2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E07 5428 bytes
font_01_sfnt_off00008085.bin
e9f2647207119a50f24d628e58dd98ec8f0a9f14909012ae772c31eedb1cf8ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8085 10156 bytes
font_02_sfnt_off0000a335.bin
e156f46211b60ff7f98edd6f8622dac9f72946c2b1b0de3670660ca4a59e8f6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA335 8304 bytes

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