Malicious PDF — malware analysis report

Static analysis result for SHA-256 2966f8ad69cfcf34…

MALICIOUS

PDF

33.4 KB Created: 2020-08-01 15:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 08cd4e6f3ea653578ebd5ed8af88c67a SHA-1: b43751a3ea087c22d9d7bf948b9987c180b8425e SHA-256: 2966f8ad69cfcf34721633e137980d5e2ac86792067e73f12a29e0ad62835cef
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a large number of external links. One of these links points to a known malicious redirector at 'https://ttraff.ru/pify?keyword=sharp+dressed+man+tab', indicating a likely attempt to lure the user to a harmful site. The presence of numerous links hosted on platforms like Shopify suggests a link farm designed to obscure the final malicious destination.

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.ru/pify?keyword=sharp+dressed+man+tab
    • http://files.slfsc.net/uploads/1/3/0/7/130739557/bc6a971.pdf
    • http://files.nhsnpa.org/uploads/1/3/1/3/131380547/8879271.pdf
    • http://files.consciouslivingtherapies.com.au/uploads/1/3/1/4/131438024/157689.pdf
    • https://cdn.shopify.com/s/files/1/0436/7328/8869/files/74596335274.pdf
    • https://cdn.shopify.com/s/files/1/0437/8014/5313/files/bokuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1370/9722/files/kidijigipudotepazofale.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/viniduwolofopegujobuwibil.pdf
    • https://cdn.shopify.com/s/files/1/0437/7303/4654/files/25092439317.pdf
    • https://cdn.shopify.com/s/files/1/0431/5725/8402/files/the_mine_song_roblox_id.pdf
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/rapov.pdf
    • https://cdn.shopify.com/s/files/1/0431/9707/1524/files/40351383231.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/najas.pdf
    • https://cdn.shopify.com/s/files/1/0431/4572/4055/files/mixelo.pdf
    • https://cdn.shopify.com/s/files/1/0438/1189/7504/files/batediwilegi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2219/5608/files/siturofo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5817/5906/files/39966886002.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5589/files/59070797051.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_off00004503.bin
3bd5683268ac5f78779e55eda9c57d1e773b11d9e8ce9da7e3a35b6728e9f845
pdf-font-stream PDF embedded font (sfnt) at offset 0x4503 5412 bytes
font_01_sfnt_off00005731.bin
37174259b781746980beebb140a84616dd2ab22b5481487eb6dc011e0f8b4962
pdf-font-stream PDF embedded font (sfnt) at offset 0x5731 9916 bytes