Malicious PDF — malware analysis report

Static analysis result for SHA-256 6346c6bfc7dc1f75…

MALICIOUS

PDF

59.4 KB Created: 2020-08-20 07:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 36fec9de64dcd53ba1b448bd80fbfdf8 SHA-1: 2762ad914e9b582d3b16b166b5533197e1f4e2c7 SHA-256: 6346c6bfc7dc1f751c95e8d7158543536c74ecc0e6e00aebf284745fafa815bd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=pl+sql+developer+nls_date_format', is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

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=pl+sql+developer+nls_date_format
    • http://files.acdapa.org/uploads/1/3/1/3/131379246/vegedudoxodofa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/chainsaw_collectors_corner.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/speaking_english_book_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2752/files/enclosed_space_entry_seagull_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/wewevirukexemitunixadak.pdf
    • https://cdn.shopify.com/s/files/1/0430/9316/4199/files/fedexaba.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/m4a_to_wav_converter.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/woxokisaperefakixudodok.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/ribozax.pdf
    • https://cdn.shopify.com/s/files/1/0439/8075/1006/files/bangalore_university_question_papers_bcom_3rd_sem_2020.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/70700425233.pdf
    • https://cdn.shopify.com/s/files/1/0428/6621/3031/files/4962433962.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/kingsman_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/7719/7221/files/30056605227.pdf
    • https://cdn.shopify.com/s/files/1/0451/7340/7893/files/xupefep.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_off0000aa3e.bin
5fb731059230c7d9c954ee383159b7d1261244462df5907c5351ebc39ff61a7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3E 5404 bytes
font_01_sfnt_off0000bc9b.bin
6a1dfce2faef7dcf5d7704d087e2afcd52da219417a11cbd092da9641fde2297		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9B 10492 bytes

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