Malicious PDF — malware analysis report

Static analysis result for SHA-256 0606b6759bfe98ce…

MALICIOUS

PDF

61.2 KB Created: 2020-08-31 13:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 866a2d21f0a5348cd0ae8e1f6a98e7fa SHA-1: 9d6c7db8073dd8d97a59019b76c72a3ed06cdd41 SHA-256: 0606b6759bfe98ce60c4e968ae6a73daf8b091ccd16398d29c450ea33e8cd832
154 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to a known malicious domain, likely as part of a phishing or scam campaign. The document body, though partially corrupted, contains text related to writing a motivation letter, suggesting a lure to entice clicks. The presence of numerous other PDF links further indicates a link farm or redirection strategy.

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=how+to+write+a+motivation+letter+for+university+abroad
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b98abb_72cd5335c9b545b1a8df691538be0e6d.pdf
    • https://static.usrfiles.com/ugd/856cea_b3f50bea0c794aff8fe0ae4fed452224.pdf
    • https://static.usrfiles.com/ugd/01e791_f846f0a5e7b54f3d84616640fa84242e.pdf
    • https://cdn.shopify.com/s/files/1/0437/4206/8887/files/investments_bodie_kane_marcus_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0439/2743/7467/files/8765088389.pdf
    • https://cdn.shopify.com/s/files/1/0430/1966/5561/files/aashiqui_3_songs_webmusic._in.pdf
    • https://cdn.shopify.com/s/files/1/0438/8637/9163/files/10848339093.pdf
    • https://static.usrfiles.com/ugd/b8c837_877179e9127044b5944510eb7fb2d58f.pdf
    • https://static.usrfiles.com/ugd/b8c837_20ffe5153bf840dda99856ec899bec2e.pdf
    • https://static.usrfiles.com/ugd/a48928_6f55a354e17d455a94e62e1e31dd14e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ef9f9b8cea641d1ade1ba70ed8125e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c62e97ffeee4f0890a877e5def6a7db.pdf
    • https://static.usrfiles.com/ugd/dad90e_0a069a43fdc64a6c9a16c4a5d138df70.pdf
    • https://static.usrfiles.com/ugd/9e41f0_511c820a2ccb40f483f60ef1cc5c3093.pdf
    • https://static.usrfiles.com/ugd/2e16aa_14620b89e65945bbb2e03790d8681049.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a26.bin
dd7b880f1c6958317b71933e3175eb4154b1281d355b69180e4ce829e506ee21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A26 2828 bytes
font_01_sfnt_off0000a420.bin
39ecb4c668bc645a26c042faedfacdf0203eb25b11833f62e63d1c9001f36ac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA420 5292 bytes
font_02_sfnt_off0000b612.bin
31795bb9bbb7358521ba547ece2c2001ebc24826e6561accec0f2c8f9ab2f291		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB612 10344 bytes
font_03_sfnt_off0000d93a.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD93A 4324 bytes

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