Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09eabf020dd5b29…

MALICIOUS

PDF

48.2 KB Created: 2020-08-12 07:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5792194e4d31c52f9b0b088fa9cedfc SHA-1: 069c28a3bd60f6f5c38a741da9c7eb3e7a7234ab SHA-256: c09eabf020dd5b2929601b5e887cd8b14ec08da829333779ed4f5dea6934097c
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of external URLs, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to potentially harmful external content through a dense network of links.

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/wb?keyword=religion%20del%20antiguo%20egipto%20pdf
    • http://files.rugbypr.com/uploads/1/3/1/3/131379832/dawuxifanitove-detirilise-kazuvevigumew.pdf
    • http://files.chennaishiayouth.com/uploads/1/3/2/7/132741352/16a15.pdf
    • http://files.unitedstaging.com/uploads/1/3/1/3/131398117/4118310.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerivavegexem.pdf
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/77048427693.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/96989909812.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/42405200109.pdf
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/81820322162.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/boresejerug.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2115/files/71228471121.pdf
    • https://cdn.shopify.com/s/files/1/0430/1081/8201/files/astrophil_and_stella_full_text.pdf
    • https://cdn.shopify.com/s/files/1/0433/8892/8150/files/19048144800.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/juzuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/71526606096.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46905239833.pdf
    • https://cdn.shopify.com/s/files/1/0430/5479/2866/files/mimizijunozawu.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_off00007e5f.bin
775fd60acd57fdddbef87d7516bf257f3ffc84f449dbe9d37daa4b3dd5f2d490
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5F 4944 bytes
font_01_sfnt_off00008f50.bin
cc26380b8c31a94516ae4f8fd9c184d38db81ce494a028c1d7f54bff3b239b91
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F50 11268 bytes