Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3590c0d81a53b43…

MALICIOUS

PDF

36.9 KB Created: 2020-08-24 04:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef0d0b068d7ee5c9765788bd24465190 SHA-1: f97b5cc875e4c6edc973ca1904bab413c20d5d4b SHA-256: d3590c0d81a53b4370750613f2e7d4ee1ab1cd4d9f6c7ec2951ff04b8edda190
152 Risk Score

Malware Insights

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

This PDF file contains a significant number of embedded links, many pointing to Shopify domains, but one critical link to `ttraff.com` is identified as a malicious redirector. The presence of a link farm and a malicious redirector suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution. 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=antenna+magus++crack
    • http://files.tlccabinetry.com/uploads/1/3/1/3/131380292/vemozokedepewuw.pdf
    • http://files.rouserconcrete.com/uploads/1/3/1/4/131482823/ba66c.pdf
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/29131478859.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/88617671276.pdf
    • https://cdn.shopify.com/s/files/1/0439/3294/2504/files/buzemirevenuja.pdf
    • https://cdn.shopify.com/s/files/1/0430/1049/0519/files/11842618070.pdf
    • https://cdn.shopify.com/s/files/1/0437/8230/7989/files/linkin_park_castle_of_glass_piano.pdf
    • https://cdn.shopify.com/s/files/1/0434/8500/3926/files/lerewivagu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/mewaburide.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3907/files/24948877637.pdf
    • https://cdn.shopify.com/s/files/1/0433/8008/0801/files/xasesonanowadukubagefalin.pdf
    • https://cdn.shopify.com/s/files/1/0433/7421/5331/files/7431907509.pdf
    • https://cdn.shopify.com/s/files/1/0439/7875/2158/files/93690067858.pdf
    • https://cdn.shopify.com/s/files/1/0436/2059/7922/files/jedegefaroxafulogutut.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_off00005437.bin
a302bd2419522b55ebfc8224354d6e1e9b433dd2d710edfbdd4f137e92c24c5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5437 5140 bytes
font_01_sfnt_off0000659a.bin
b82b293f40646996cafb8f52072f888cd82402208a15668f74fa7a9aaf15841a
pdf-font-stream PDF embedded font (sfnt) at offset 0x659A 9792 bytes