Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8dca308524b2806…

MALICIOUS

PDF

43.1 KB Created: 2020-08-05 01:35:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6d00b7857625b9d5916f6cce7e15cbe SHA-1: 9dcf811ddc819aff18b50376903a0f83dea5345c SHA-256: b8dca308524b2806bdb71ffc0b09ef9d371a4b75ae507bc9e48a93c34cd87293
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body appears to be malformed or obfuscated, but the presence of numerous links, including one pointing to `https://ttraff.ru/pify?keyword=receptive+bilingualism+pdf`, suggests a lure to external 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.ru/pify?keyword=receptive+bilingualism+pdf
    • http://files.buildinglastingmemories.com/uploads/1/3/2/6/132681947/sanijokinesugani.pdf
    • http://files.nomadesgourmandes.com/uploads/1/3/1/4/131482939/5882482.pdf
    • http://files.cadavercarnivalstudios.com/uploads/1/3/1/0/131071157/wowekalimijukaduzagi.pdf
    • http://files.omoristore.com/uploads/1/3/1/8/131858791/nirut.pdf
    • http://files.fgsdpac.org/uploads/1/3/0/7/130740049/3263893.pdf
    • https://cdn.shopify.com/s/files/1/0429/0176/6310/files/besogeri.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/13319765132.pdf
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/latin_english_dictionary_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gokibaleginasesomedusuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/41016021448.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43396058945.pdf
    • https://cdn.shopify.com/s/files/1/0451/2507/5109/files/malaria_treatment_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/2582/3904/files/cheat_engine_6._1.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/zupiziv.pdf
    • https://cdn.shopify.com/s/files/1/0432/0532/9064/files/wuxutun.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/vofuwosukolumawasuguwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/a_level_computer_science_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/2929/0390/files/15989658676.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_off0000697a.bin
c139d08e7e8aad08405cb19de04ffc11748da067a0bb8457fe6e520c9c87d2aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x697A 5584 bytes
font_01_sfnt_off00007c72.bin
42c18ac5417e0294a864fc651d0b4e57f6574bc1b662e4050a5763a84b003795		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C72 10324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.