Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6c173475c184c47…

MALICIOUS

PDF

55.0 KB Created: 2020-08-15 06:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df46462fb81f98739018bb3ff7ace451 SHA-1: 598bda0a4cfb18d5b889d8c2f963f97d206b3f35 SHA-256: b6c173475c184c4788a797d25fa825d9cf16ba049b1ab077f6234d47c1b7fad6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The embedded document body, though partially garbled, contains the text 'Mn ignition interlock program guidelines' and the malicious URL, suggesting a lure for users seeking information, potentially leading to phishing or malware distribution.

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=mn+ignition+interlock+program+guidelines
    • http://kikilun.counterviolenceusa.com/uploads/1/3/1/4/131453645/281ca28cd34c212.pdf
    • http://files.amaranthusestate.com/uploads/1/3/0/7/130740190/638ad91dc29.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8472/files/how_to_arrange_pages_in_order.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/jiwujowolopup.pdf
    • https://cdn.shopify.com/s/files/1/0447/8684/3799/files/romancing_the_balance_sheet_book.pdf
    • https://cdn.shopify.com/s/files/1/0445/5959/7727/files/inhibitors_of_protein_synthesis.pdf
    • https://cdn.shopify.com/s/files/1/0434/4781/2248/files/96245600302.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/zebenajag.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/65243365899.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/esercizi_ginnastica_antalgica.pdf
    • https://cdn.shopify.com/s/files/1/0433/3918/6344/files/abas_ii_scoring_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/post_acute_withdrawal_syndrome.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8893/files/pharmacology_ebooks_free_download.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_off0000990d.bin
21badf749d3752ee13fa077927c05928e0829de0ada07f1235ffec8fd7958ba7
pdf-font-stream PDF embedded font (sfnt) at offset 0x990D 5464 bytes
font_01_sfnt_off0000ab92.bin
09e08ca766cf0ad6ae3fdbc48aad59a3aeac39747a05bbb5dff1832e956cc248
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB92 10472 bytes