Malicious PDF — malware analysis report

Static analysis result for SHA-256 51148c7136454107…

MALICIOUS

PDF

43.7 KB Created: 2020-08-11 22:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1daae4f07125785db34e1ec9133a5fb SHA-1: a47c6803e8d6362b852961121a06cf4805b51385 SHA-256: 51148c7136454107781e52e3098f28efbb95d42273a202c00459921577a2dc19
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, many pointing to Shopify domains hosting other PDF files, indicative of a link farm. One critical heuristic identified a link to a known malicious redirector at 'ttraff.com'. This suggests the document is designed to distribute malicious content or manipulate search engine results through a network of linked PDFs.

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=ferraillage+escalier+b%25C3%25A9ton+arm%25C3%25A9+pdf
    • http://files.fazzersports.com/uploads/1/3/1/4/131437306/4954834.pdf
    • http://files.nicholaspalmer.com/uploads/1/3/1/3/131379540/dc9e896e74161a.pdf
    • http://files.firstchurchnyc.net/uploads/1/3/1/1/131163667/ad5618e43ef.pdf
    • https://cdn.shopify.com/s/files/1/0434/2002/4989/files/acknowledgement_letter_for_receiving_documents.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/fupegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/majiguvuvalipuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/buxeketusom.pdf
    • https://cdn.shopify.com/s/files/1/0437/8850/1143/files/talojoletapukojoboxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5058/1662/files/presentation_software_definition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/29870517007.pdf
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/princeton_review_mcat_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7093/files/57502640288.pdf
    • https://cdn.shopify.com/s/files/1/0431/5450/5882/files/48939454446.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f55.bin
a06813a6e0cbe82c62d52c774848320eb4cd747df6b656a450c70479ae835eaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F55 5712 bytes
font_01_sfnt_off00007259.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
pdf-font-stream PDF embedded font (sfnt) at offset 0x7259 1800 bytes
font_02_sfnt_off00007ae6.bin
b1c72473d6227e0801f59669347b39116475770f355f3b1563d295a341fddf9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE6 11360 bytes