Malicious PDF — malware analysis report

Static analysis result for SHA-256 3408debf67c0292f…

MALICIOUS

PDF

45.1 KB Created: 2020-09-05 00:24:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32d0665ed460e40599f18dd570664229 SHA-1: 292ad6099ddd0de8355f5b118fac8e78c625c611 SHA-256: 3408debf67c0292f12043c8129d0b5126b3a514dcb74c9f42cd9a2eff0aee308
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 'https://ttraff.club/pify?keyword=amreli+weather+report'. The document body also contains this URL and numerous other PDF links, suggesting a link farm or redirection attempt. The ML classifier also strongly flagged this PDF as malicious.

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.club/pify?keyword=amreli+weather+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/9116/5333/files/60146516045.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4675/files/fubetadukik.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/giworukekirix.pdf
    • https://cdn.shopify.com/s/files/1/0429/2653/8911/files/how_to_analyze_data_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0439/9444/8030/files/42173446331.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_8f450129d1e44330a3338f00ee45942b.pdf
    • https://static.usrfiles.com/ugd/868b90_ce700943499848bba8a5538ec5a12c69.pdf
    • https://static.usrfiles.com/ugd/70e5f7_ee94787e4ed14506aad8936029d11b16.pdf
    • https://static.usrfiles.com/ugd/2e16aa_d2ee8a1bbffc4eae97bceeec919edc12.pdf
    • https://static.usrfiles.com/ugd/72b0e7_77351ab41a154d438107f3b28c4cc05a.pdf
    • https://static.usrfiles.com/ugd/0c41e7_13c06ac8b8054bea8b146c7ec8fd36cc.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_db61e4e23a164351bb8731592e33c9f7.pdf
    • https://static.usrfiles.com/ugd/a59130_4980eabbdf634de587241c3a800eca63.pdf
    • https://static.usrfiles.com/ugd/bbd3cf_9ddae1fe8d2c46178d431e2ffad3ede6.pdf
    • https://static.usrfiles.com/ugd/2eedf1_2e6610a2a21c4303b1893153f0f956c6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066d4.bin
8179a183eb4cef27ef6beb117e613c676cfd9208725063786dab749f94397e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66D4 4644 bytes
font_01_sfnt_off0000769a.bin
e8862cd753436fed98537902a42348d0aeda907cbd63da39bdaa7192ffd66130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x769A 10256 bytes
font_02_sfnt_off000099ae.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x99AE 4324 bytes

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