Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1cdde6bbedfa4ef…

MALICIOUS

PDF

50.7 KB Created: 2020-08-31 13:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecc747bd4c8a8ef33ecf3622cdf1fa28 SHA-1: 6387d1dece3db4b48777a0fbfd454b3d63cb84ad SHA-256: d1cdde6bbedfa4ef3559a6f27ca68d6556e1fa35adc4418ef1038a00edcd6177
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Nist 800-171 access control policy template' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector.

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/wix?keyword=nist+800-171+access+control+policy+template
    • https://cdn.shopify.com/s/files/1/0429/7513/3859/files/dawufozesilokuwonofokiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xaxigeruver.pdf
    • https://cdn.shopify.com/s/files/1/0437/9171/2405/files/dazuwisemizalowokamegaja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9072/3487/files/litubadegubamalagozumunak.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/fine_woodworking_torrent.pdf
    • https://static.usrfiles.com/ugd/bae363_dc007b3928b44d7cb23f1a4dd347613d.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_3c77cd9da30b4b6bbbfc74b42887405e.pdf
    • https://static.usrfiles.com/ugd/eb4c03_6ac9e1178fee4cf3afc1f8750fc9dc60.pdf
    • https://static.usrfiles.com/ugd/c0b427_fc320f48b53046ce9a186a43e3f69033.pdf
    • https://static.usrfiles.com/ugd/e2c250_812e32561c8d4ac9846056deb69a5303.pdf
    • https://static.usrfiles.com/ugd/e4ff69_1e8d3a0be0c74aa2aeaa132c25a41aca.pdf
    • https://cdn.shopify.com/s/files/1/0438/3506/4480/files/tokyo_ghoul_manga.pdf
    • https://cdn.shopify.com/s/files/1/0434/5076/1377/files/31107672975.pdf
    • https://cdn.shopify.com/s/files/1/0430/8320/2711/files/twister_game_rules.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_off00006f73.bin
03a3dc26bdcb931319854d1ea31d1ee168d15db5b1f98ef08234555f78cd2fb6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F73 5648 bytes
font_01_sfnt_off000082b7.bin
bed46cd2abf0843208d6ef79f43ba7e833b6bd4a115f1b31c60d57d1d899ed8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x82B7 10912 bytes
font_02_sfnt_off0000a836.bin
541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501
pdf-font-stream PDF embedded font (sfnt) at offset 0xA836 16204 bytes