Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60f9b4234a44edd…

MALICIOUS

PDF

42.4 KB Created: 2020-08-28 02:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df28b666bcc436e909cd7c52bb91c0d5 SHA-1: 78eff01afb357e460f69a4d5b85a088f2b125bb7 SHA-256: a60f9b4234a44edd44b2676b23202197d1ea7fb225221004f36af289cac828cf
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a review for 'Fantastical 2'. This link, https://ttraff.com/pify?keyword=fantastical+2+review, leads to a link farm hosting numerous other PDFs, indicating a campaign to distribute potentially malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and link farm behavior.

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=fantastical+2+review
    • http://files.macgymohio.com/uploads/1/3/1/4/131406947/7f52c66f9049.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/volimilux.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/activated_carbon_research.pdf
    • https://cdn.shopify.com/s/files/1/0435/8370/1151/files/pesupogitalerivef.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21883700101.pdf
    • https://cdn.shopify.com/s/files/1/0439/1796/7528/files/36106195970.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/74828771034.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/behavioural_science_in_management.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1369814796.pdf
    • https://cdn.shopify.com/s/files/1/0429/9092/8026/files/malayalam_album_songs_free_saleem_kodathoor.pdf
    • https://cdn.shopify.com/s/files/1/0438/4564/8546/files/loan_amortization_table.pdf
    • https://cdn.shopify.com/s/files/1/0435/3903/8360/files/tedep.pdf
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/bexomalolozulotitad.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/85646233103.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_off000068a9.bin
31d80bc6bd342995433a8dfedf6e67e4170b57a24642f4bb82f8e6d56b9a74b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x68A9 5032 bytes
font_01_sfnt_off000079eb.bin
09e270f5f8898269863af7206b81333939fee850cea9f200e7c449eb3f5ca595
pdf-font-stream PDF embedded font (sfnt) at offset 0x79EB 10312 bytes