Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8942eb6c2ba97b…

MALICIOUS

PDF

46.6 KB Created: 2020-09-09 21:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22d43974faf3ff30598c7a69e8d3a69d SHA-1: 672c574f75e9704c96f2281c2fce8c4c44da0708 SHA-256: 6f8942eb6c2ba97b723110890e1b6dd7d3ad4071666a908ca1ffdda99e294a7d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector service, which is a common technique for distributing malware. The document body, though heavily obfuscated, contains text related to software downloads and a URL that appears to be a lure for a specific application. The presence of numerous PDF links, including one to a malicious redirector, strongly suggests an attempt to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/wix?keyword=adobe+audition+1.+5.+exe+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3b5dd9_6bebf47ec2cc40bd8a620d167de6a156.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e868a2d46954e33b30e3abfdd12f5c1.pdf
    • https://static.usrfiles.com/ugd/fdd6c2_b1833c94222c4221b6cd5b2eaaa047db.pdf
    • https://static.usrfiles.com/ugd/21e6f2_9019b1197041476bb6f942d5dda47e0c.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/xovixumoginapumiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35543542817.pdf
    • https://cdn.shopify.com/s/files/1/0429/9826/8065/files/4644647656.pdf
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/91980051550.pdf
    • https://cdn.shopify.com/s/files/1/0428/4963/2415/files/45568769738.pdf
    • https://static.usrfiles.com/ugd/77941b_2cebb738ed5d46b1972583a78f7cf3ca.pdf
    • https://static.usrfiles.com/ugd/decf6f_0c45024c199a40b5871ca0636f393ad0.pdf
    • https://static.usrfiles.com/ugd/21e6f2_8dd856fee9694f9aafe7e200318074e4.pdf
    • https://static.usrfiles.com/ugd/a64c8c_7a33df2579574305a1929c1ecbec4c25.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064dd.bin
75f6a1fb22013c34bbadef87e343003c6d3111dcf81c6282b8f1286a50157063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DD 5096 bytes
font_01_sfnt_off0000765b.bin
e13a757c7d936f9816676290ff2b3f9c8e96337bc23a351b49455bedd1b4143f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765B 10076 bytes
font_02_sfnt_off000098a6.bin
2e969934b98279dc8aea21a1cfec87ed8458c0d9985c5f19914d6fb4e2e0c341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98A6 16064 bytes

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