Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9528490317e4014…

MALICIOUS

PDF

43.7 KB Created: 2020-08-12 06:50:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e44840273626220a1e51b207d28f7d7 SHA-1: bc52a37f0c82eacf0862aa1bacdb233522d03033 SHA-256: d9528490317e4014bae809b909f04f5c84f3162e0766c880cc9de3b3fa383af5
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are part of a link farm hosted on Shopify, likely to improve search engine ranking for malicious content or to obscure the true destination. The primary malicious URL is ttraff.com, which is a known 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/pify?keyword=agisoft+photoscan+workflow+pdf
    • http://tejut.claphands.net/uploads/1/3/2/8/132816066/4175395.pdf
    • http://futib.peascommunity.org/uploads/1/3/2/7/132710621/1553726.pdf
    • http://sakoda.beavertonrailroadclub.com/uploads/1/3/1/3/131381204/e8ab3e5156.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/womosoravitixugefiwil.pdf
    • https://cdn.shopify.com/s/files/1/0429/2755/4723/files/adeste_fideles_score.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/sakod.pdf
    • https://cdn.shopify.com/s/files/1/0430/3355/9203/files/ansi_denial_reason_codes.pdf
    • https://cdn.shopify.com/s/files/1/0438/1255/2864/files/junare.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/53563739341.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/86880236277.pdf
    • https://cdn.shopify.com/s/files/1/0440/4586/1014/files/26678787098.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/9279019776.pdf
    • https://cdn.shopify.com/s/files/1/0432/4245/5207/files/gmat_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/pokemon_blue_strategy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/june_2020_calendar_template.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e24.bin
22e841b5bbc506a383623c0db0282f137bf1f8131f97565e0fe48807eddf80fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E24 5564 bytes
font_01_sfnt_off00008114.bin
1e88f5a8482f96f7253fbc7c77ac360495499903b38f13b405162d63da664630
pdf-font-stream PDF embedded font (sfnt) at offset 0x8114 9672 bytes