Malicious PDF — malware analysis report

Static analysis result for SHA-256 14db64a15ce6c8f7…

MALICIOUS

PDF

41.4 KB Created: 2020-09-09 09:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b14a2829b3bc724678c16024c3e7d5e9 SHA-1: de8491478090c1b9a64b1a04c19008301d50a7ca SHA-256: 14db64a15ce6c8f7b510233221aba8b2ffb7116ff962df646553a778da6e9165
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=microsoft+word+2010+certification+practice+test+answers', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is related to Microsoft Word certification practice tests, indicating a social engineering lure. The presence of numerous PDF links, many pointing to benign content, suggests a link farm tactic 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.me/wix?keyword=microsoft+word+2010+certification+practice+test+answers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/38bf1f_b6343bd826e54d63b72a1801842f17f6.pdf
    • https://static.usrfiles.com/ugd/97634b_4d8598105d4a44659269b02cbb67217a.pdf
    • https://static.usrfiles.com/ugd/6f9b04_b9b00f852e1146b8bb436d0f9a3d4198.pdf
    • https://static.usrfiles.com/ugd/b4a829_c106ec8f6e3b4744b6f16c19d9c17c6d.pdf
    • https://static.usrfiles.com/ugd/8cbfce_b133672ff27a481e9ceed271e3365304.pdf
    • https://cdn.shopify.com/s/files/1/0437/9105/7058/files/antioxidant_activity_thesis.pdf
    • https://cdn.shopify.com/s/files/1/0429/3731/9590/files/latest_movies_sites_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/wevafefikoweres.pdf
    • https://cdn.shopify.com/s/files/1/0437/0294/3899/files/harris_tweed_flat_cap_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/5561/8977/files/teen_wolf_season_6_episode_1_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/34775934061.pdf
    • https://cdn.shopify.com/s/files/1/0435/4605/0728/files/xijekujugusidep.pdf
    • https://static.usrfiles.com/ugd/913720_a8efd4098776445c8741cb83cb61f71b.pdf
    • https://static.usrfiles.com/ugd/b7ed05_76ac64f877fc4557874f4604b7bb8041.pdf
    • https://static.usrfiles.com/ugd/b8c837_22753cedaa424edbbe5fa513a506f6e2.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000634c.bin
ea248d51460fc63292e9022c4ecfa9df1ca6f03d1a4f0355ea7e8f00d352d0e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634C 5540 bytes
font_01_sfnt_off00007657.bin
9c57f1ff79f4baab3bab68015d8a951c4ade738d19385b37e663b2314db045b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7657 10000 bytes

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