Malicious PDF — malware analysis report

Static analysis result for SHA-256 d318ff367a61380c…

MALICIOUS

PDF

39.3 KB Created: 2020-08-11 01:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9a6f37993ce8a48fcd6147ac3ea7af1 SHA-1: 19336a046615f282bc5a0f92ea03b087b583c478 SHA-256: d318ff367a61380c0a37edd77226861c721aab3c6fe2a2ccd1b60d15f717146c
154 Risk Score

Malware Insights

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

The PDF document exhibits malicious behavior through a critical heuristic firing indicating a redirector link to ttraff.com. Additionally, it contains a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm designed to obscure the ultimate destination. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to click on these links, which likely lead to phishing sites or malware downloads.

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=conductors+and+insulators+examples+pdf
    • http://files.dependabullbulldogs.com/uploads/1/3/0/7/130775221/7c983.pdf
    • http://files.downsizefarm.com/uploads/1/3/0/9/130969548/pexebekawet.pdf
    • http://files.pilar-quintana.net/uploads/1/3/2/8/132813998/fomudoketef.pdf
    • https://cdn.shopify.com/s/files/1/0434/7897/4616/files/jobawatajotunalirokexira.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/31690581750.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/vejosumemewavivej.pdf
    • https://cdn.shopify.com/s/files/1/0431/3504/1702/files/daponinimeluzewisoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/93666143886.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/63362624425.pdf
    • https://cdn.shopify.com/s/files/1/0431/0610/7552/files/5076363549.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8122/files/rofumurosekixow.pdf
    • https://cdn.shopify.com/s/files/1/0429/5376/9123/files/sepegil.pdf
    • https://cdn.shopify.com/s/files/1/0431/3474/6781/files/monster_manual_5th_edition.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_off00005d65.bin
bb142484aba609a42915187d8e6557dd8dbb73290905bf1a839c48281a84035e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D65 5272 bytes
font_01_sfnt_off00006f40.bin
36254ecaa8e58ddd017b1485a090126aad6f84174dfb2ba353f7385120397160
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F40 9772 bytes