Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba7215ee8ce92d28…

MALICIOUS

PDF

54.3 KB Created: 2020-08-22 12:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ebbe0145093ea7a1a8f8b694d03bb5 SHA-1: c096afd3284f674035bf13a55b26d2805e5b6b7a SHA-256: ba7215ee8ce92d28e17f4a9d5b52d04420e8a006ce6ce9e5a5e017077ee64369
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body also contains this URL, suggesting it's the primary lure. The presence of numerous other PDF links, many hosted on Shopify, points to a link farm strategy to obscure the malicious destination. No scripts were extracted, but the PDF structure and embedded malicious URL are sufficient indicators of a phishing or redirection attack.

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=vocals+samples+free
    • http://buresa.animalintuitivereading.com/uploads/1/3/1/6/131606111/ritedufe.pdf
    • http://rewilul.wstcharity.com/uploads/1/3/1/6/131606295/sureme_xekoz_tufigunonoz.pdf
    • http://files.rhfarmersmarket.com/uploads/1/3/1/8/131859895/4f31f9775b79c5.pdf
    • https://cdn.shopify.com/s/files/1/0444/0922/5382/files/ashokan_farewell_violin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/administrator_duties_and_responsibilities.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/arkansas_vehicle_bill_of_sale.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/91191720558.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/39530741902.pdf
    • https://cdn.shopify.com/s/files/1/0429/6487/7471/files/nazonaripog.pdf
    • https://cdn.shopify.com/s/files/1/0429/8083/5482/files/lorunibavi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2385/8850/files/arkansas_drivers_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8514/files/treatment_of_ebola_virus_disease.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a4b.bin
746cda19d0a45b0d6108c63ff8192b2f88c2fff5e5937e692a7cb04b31166607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4B 6588 bytes
font_01_sfnt_off00006ac5.bin
d388f1443d3ed5e86ef662438f04fb758c8928458030495773fd2f2b24d6a4ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC5 5128 bytes
font_02_sfnt_off00007c13.bin
9c23574708d3c63f1d5f3db444c2c2acb23f834480ed2a9821e000be50a4c97f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C13 3268 bytes
font_03_sfnt_off00008961.bin
c93757e3dd3f57a7a545a69d8b641945bf92611d0690a48489b3ee70c06cc020		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8961 14220 bytes
font_04_sfnt_off0000b5fb.bin
18820e64b89489c6901bdbad9637cefc87d81bb55776bf10726fbc7439458c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FB 16336 bytes

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