Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b14a08b28cbd98…

MALICIOUS

PDF

44.7 KB Created: 2020-08-25 11:42:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33571d3369d0e504ad06536f29f6c5ed SHA-1: 78fe01233ebeadf0de446bf8eadd25a84013b7c0 SHA-256: c5b14a08b28cbd98b78eb604a75417a5fe4df494739ac4fe933ac95f955d8701
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.cc', which is known for malicious redirection. Additionally, it exhibits a PDF link farm, with numerous links to PDFs hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify-hosted PDF URLs. This suggests a campaign focused on distributing content through a link farm, potentially for SEO manipulation or to host further malicious payloads.

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.cc/pify?keyword=shayari+video++pagalworld
    • http://files.verybestfineart.com/uploads/1/3/0/7/130776607/xitedakegit-moneterus.pdf
    • http://files.westannaboutique.com/uploads/1/3/2/6/132681690/dewubinije.pdf
    • http://zapofim.lavidaarizona.com/uploads/1/3/2/6/132681268/dejurop_lejojowijokinox_tuxefoza_junexijef.pdf
    • https://cdn.shopify
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/lj_clancy_aerodynamics.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2090/files/86361337938.pdf
    • https://cdn.shopify.com/s/files/1/0439/9710/2238/files/ford_econoline_e_motorhome_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7032/files/the_human_species_an_introduction_to_biological_anthropology.pdf
    • https://cdn.shopify.com/s/files/1/0435/4162/7029/files/cakewalk_sonar_8_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/93260741693.pdf
    • https://cdn.shopify.com/s/files/1/0427/9438/5575/files/biological_psychology_11th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/58004831818.pdf
    • https://cdn.shopify.com/s/files/1/0434/5721/6678/files/black_boy_text.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/stihl_fs_45_parts.pdf
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/38624843610.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/kelaso.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_off00007219.bin
a47136ec7e4d69867354b85bd5d6b7e212d77dbdcc8c0bb583bb24053cc369a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7219 5400 bytes
font_01_sfnt_off00008488.bin
434ca2cb5850830b05e9f6911a38f3dcb78ea7acd799e1e3e84ec3b866cae64e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8488 9716 bytes

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