Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b617c68c4e6fb6…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 03:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d565f5b7f32d270426ce081b6120b401 SHA-1: 0c38c45e43ed303a4dbda5204c645bf6e6e12893 SHA-256: 73b617c68c4e6fb6210a73674cdea9135321893132aaf38c12c0f758f37bfc06
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical redirector link pointing to ttraff.com, which is known malicious infrastructure. The document body, though heavily obfuscated, contains text related to a movie download lure, suggesting a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/pify?keyword=choomantar+full+movie
    • http://files.deanglobalindustries.com/uploads/1/3/2/6/132681579/bisade_wetegogeni.pdf
    • http://files.havanarb.net/uploads/1/3/0/9/130969728/c5a7f42985.pdf
    • http://files.slackkeymusiccenter.org/uploads/1/3/1/4/131438067/dajujajelepej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0432/0637/7632/files/7519476944.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/jotaburanubozuzuwawatudiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/mopibawiwutufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7056/2209/files/43422677221.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/brother_mfc-_j4510dw.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/xiropitugasa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4905/7430/files/convert_file_to_word_doc_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/the_abominable_bride_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/8448/8607/files/university_transcript_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/65164736590.pdf
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/tokumuwixibobenuvoxutel.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_off00005b82.bin
9585993993bc48e783afa47ff3deebf60f5d0cc3c889a2f755f0c0847d47f80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B82 4796 bytes
font_01_sfnt_off00006baa.bin
e0c76cab6b63e990298ae378de822bc8c6f8fd7bd6cec9af8206c9e5d0fdb7d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAA 13216 bytes
font_02_sfnt_off000095fa.bin
0cc72dc7384239ea77fd5201a0f3bebf56be3b0a64ac0748fe4403cff5837b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95FA 2908 bytes

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