Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e7687f5b52d17cc…

MALICIOUS

PDF

43.6 KB Created: 2020-08-07 06:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2d79199006ea231937a9b27c97d80bd SHA-1: 19b461d0c4c68dd3e042b3353ca6df87699ecbfa SHA-256: 7e7687f5b52d17ccd24e9bfadfe11a487e22ba1632b31df73d22d03af7e06ac8
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, masquerading as a software manual download. This is supported by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and numerous links, many hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content.

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=adobe+photoshop+premiere+elements+13+manual+download+pdf
    • http://files.guyinspired.com/uploads/1/3/1/8/131872055/3913298.pdf
    • http://files.worldclassinstitute.net/uploads/1/3/1/8/131858044/c870d64d.pdf
    • http://files.aliahjan.co.nz/uploads/1/3/1/4/131453436/7a766.pdf
    • http://files.planetearthexperience.com/uploads/1/3/0/7/130738943/cf6f8d5f.pdf
    • http://files.therazorandshear.com/uploads/1/3/2/6/132682806/0884090d3a86b.pdf
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/56295919953.pdf
    • https://cdn.shopify.com/s/files/1/0430/3031/5159/files/80951352635.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1356/files/56019025028.pdf
    • https://cdn.shopify.com/s/files/1/0437/7916/2263/files/66701837331.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/buzezamuradimiriz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwizesovipijekugufex.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/jurnal_politik_etis.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/sekiro_mist_raven_feathers.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/mapibizowezavebetovot.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_off00006b31.bin
e1e8f5064569e7af2d3b14b3b069c45dca5c678f696f66a037383a577e2964b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B31 5716 bytes
font_01_sfnt_off00007e8e.bin
1c6d32f700b56517f140c295ecaa5ec87ff0753402e9d3cd770e668c5c46086a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8E 10208 bytes