Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3ff2e6592fc642…

MALICIOUS

PDF

53.5 KB Created: 2020-08-20 22:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fab35a1aec592383670fcab21ca4fac1 SHA-1: b5e2da287e6dc7e98a743b1ff5a3e350e2c7e3be SHA-256: bc3ff2e6592fc64211c7c976cb3f28a7f37b140724997e485b89a275859dc2a1
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com' disguised with a 'cg comedy movie' lure. This redirector then leads to a link farm of other PDFs hosted on Shopify, indicating a phishing or scam campaign. The ML classifier strongly supports the malicious nature of this PDF.

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=cg+comedy+movie
    • http://fopoju.flowersfromsarahsgarden.com/uploads/1/3/0/7/130739892/vopemuvofe.pdf
    • http://jolaz.aandloils.com/uploads/1/3/1/3/131398134/6d24c19902ac3e.pdf
    • http://sunew.ugranitesandcabinetsmore.com/uploads/1/3/1/4/131406390/5101701.pdf
    • http://files.odazzitclub.net/uploads/1/3/0/7/130738919/xobebowetogo.pdf
    • http://zerik.clarkpiperepair.com/uploads/1/3/0/8/130874359/586830.pdf
    • https://cdn.shopify.com/s/files/1/0434/7081/5397/files/zenulaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3474/6790/files/sojamexigajopadupuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5599/6328/files/rosawitijot.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/motuxufogefesikunotor.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuvitew.pdf
    • https://cdn.shopify.com/s/files/1/0433/3119/0952/files/javascript_encryption_libraries.pdf
    • https://cdn.shopify.com/s/files/1/0432/8236/6624/files/ambulance_competition_song.pdf
    • https://cdn.shopify.com/s/files/1/0430/6491/8165/files/84324938740.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/28967898311.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_off00009601.bin
6adcebcd987763f2c2759770d8738f87d0c09b045b0854ba9b5ec53a3b3c9dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9601 4808 bytes
font_01_sfnt_off0000a65c.bin
56dafa82929b718725007911a105e25b01e69119f335e2ce5a7d78279fb8a1e9
pdf-font-stream PDF embedded font (sfnt) at offset 0xA65C 10248 bytes