Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b005c343fdd8c0…

MALICIOUS

PDF

39.5 KB Created: 2020-08-16 15:19:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e589e72339488b0342d0472b536027f9 SHA-1: e87323f9ad476d4f5fb375b228a2fa4d83f7ed08 SHA-256: e5b005c343fdd8c0d30cbad1ef838e3ba3fe0deb96afd57aa7bc54e718ddb224
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=antenna+directivity+pdf', suggesting a lure to external malicious content. The presence of a large number of links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially improve search engine ranking for malicious content.

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=antenna+directivity+pdf
    • http://files.mvcalvarybaptist.org/uploads/1/3/1/6/131606815/wifob-vunajilifa.pdf
    • http://files.woodcraft82.com/uploads/1/3/2/6/132696104/sawivu-nalazobejena-kuwefojug.pdf
    • https://cdn.shopify.com/s/files/1/0432/3111/7467/files/11835276534.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6911/files/lifemejaju.pdf
    • https://cdn.shopify.com/s/files/1/0438/7612/2779/files/biology_textbook_for_class_11.pdf
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/university_calculus_early_transcendentals_3rd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/gepakiwamozoxerokeko.pdf
    • https://cdn.shopify.com/s/files/1/0434/7455/0950/files/cub_cadet_5252.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/darezazo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/pawute.pdf
    • https://cdn.shopify.com/s/files/1/0437/3564/6357/files/17743717845.pdf
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/mivuzosolirebexewogewode.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_off00005e82.bin
f0b3a657c20e517b891f666fee9abf64d07b08226e4bd09d0cba389043bd2638
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E82 5092 bytes
font_01_sfnt_off00006fe7.bin
918fcd4e346699070cca6c90535b88711c3a035dd61480c2a44147afb182bcc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE7 9940 bytes