Malicious PDF — malware analysis report

Static analysis result for SHA-256 272626eae9e769d7…

MALICIOUS

PDF

44.9 KB Created: 2020-09-10 18:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1779ee2ac3c39e3da812ada9a540a248 SHA-1: f08c5e131613e89a576fd3ff9c192cf81adf59be SHA-256: 272626eae9e769d7a242ad3b95ec7ede0f9820d7cade1cf6b690a4601754d0b9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link to 'https://ttraff.club/wix?keyword=dharam+adhikari+movie+songs'. Additionally, it features a PDF link farm with numerous links to Shopify-hosted PDFs, suggesting a tactic to obscure malicious intent or distribute content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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.club/wix?keyword=dharam+adhikari+movie+songs
    • https://cdn.shopify.com/s/files/1/0438/5095/6960/files/30640345518.pdf
    • https://cdn.shopify.com/s/files/1/0431/4556/0226/files/74082283097.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/potekevefizavikixapeg.pdf
    • https://cdn.shopify.com/s/files/1/0465/0939/2030/files/more_than_this.pdf
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/jotikovenusukiworid.pdf
    • https://cdn.shopify.com/s/files/1/0430/4375/0049/files/1878296064.pdf
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/97733877741.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/93275462613.pdf
    • https://static.usrfiles.com/ugd/f68081_b3bf043ffc554920be60956ab6dc7e31.pdf
    • https://static.usrfiles.com/ugd/e5412a_08f5d81142134e6180a243780e83d18f.pdf
    • https://static.usrfiles.com/ugd/6cf804_9d5feabac90c46ac805d2567856c92ac.pdf
    • https://static.usrfiles.com/ugd/cc15ef_448756bd7e7d4034938704ada727cfc7.pdf
    • https://static.usrfiles.com/ugd/1df9ea_f6c3ce5c1eda4c3595cad5c32ed392e4.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_off0000699b.bin
55b7b81c932696dd8d78de64b306fafb96f031c0b516ac30f26a34e1886632b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x699B 5328 bytes
font_01_sfnt_off00007b9d.bin
93c28c45839880ce7341de38c060e15d09669e9d489cb4c0d38f2b83fe11ec24
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9D 14052 bytes