Malicious PDF — malware analysis report

Static analysis result for SHA-256 5988e0a9d44d4830…

MALICIOUS

PDF

43.3 KB Created: 2020-08-14 13:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3c2973da4480ebb65935af4a138ea32 SHA-1: 2233ae0a900fbd9afc84d1d10b19b1192a23af18 SHA-256: 5988e0a9d44d4830eff10efa7e5668cd3c098bd5010b778ab9fde26b44830947
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a 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.com/wb?keyword=sony%20minidisc%20mds-je330%20manual
    • http://files.ectrojanbands.com/uploads/1/3/0/9/130969175/80c8af6463.pdf
    • http://wuxemo.austin.foodecosystem.org/uploads/1/3/2/6/132681556/3253248.pdf
    • http://vafan.thequietcone.com.au/uploads/1/3/2/3/132303189/zoziwirajunalo_biwifore.pdf
    • https://cdn.shopify.com/s/files/1/0428/2892/3046/files/17051293358.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/23988751432.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/48978508564.pdf
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/risk_management_and_insurance_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/2602/1527/files/ribojaga.pdf
    • https://cdn.shopify.com/s/files/1/0436/8619/9461/files/auf_kindle_lesen.pdf
    • https://cdn.shopify.com/s/files/1/0436/0437/7757/files/sbi_exam_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/20117250439.pdf
    • https://cdn.shopify.com/s/files/1/0431/4529/8080/files/kunci_jawaban_understanding_and_using_english_grammar_third_edition.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006323.bin
f2901ffc705a68321369c3f64e6d0f66188f3af74837d5d5c46d8495f5b863e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 5608 bytes
font_01_sfnt_off000075e8.bin
696ba27d51c660ec4fc41bfaaef1e4ab2ff293b9f4dc007683747c5c062ed7ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 1404 bytes
font_02_sfnt_off00007d8c.bin
3dd15304bf4a5d1b59a7d28d461a3a2cbcd8e21cdfd8148f56b751682a3a2085
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8C 10164 bytes