Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1150d8a15c4802c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-17 04:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a51582d7d92d96f6a037dffcb87016a SHA-1: e5a4a0e8a73cf6f0421b51daf065d874e1fca7d1 SHA-256: e1150d8a15c4802cfe7b7da15ae3cdc8ea719726668f8b1290b27b3be319a33c
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a high density of embedded links, many of which point to a redirector service. The document body contains garbled text but also includes the URL 'https://ttraff.ru/pify?keyword=bson+format+full+form', which is flagged as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a link farm. The primary attack pattern involves luring users to malicious sites via these numerous links.

Heuristics 3

  • 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.
  • 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=bson+format+full+form
    • http://xurud.studiolobue.com/uploads/1/3/0/8/130814995/dudinolawoj_nubazokod_masid_xozatur.pdf
    • http://files.buildnobleinc.com/uploads/1/3/1/6/131606984/2902930.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/gewolezozuxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/72390399276.pdf
    • https://cdn.shopify.com/s/files/1/0429/3771/2806/files/nojowax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6215/6702/files/reruwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/git_push_with_ssh_key.pdf
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/rotediniwisiwujunixupe.pdf
    • https://cdn.shopify.com/s/files/1/0430/4663/3621/files/jomuxo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/42365368600.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/manaru.pdf
    • https://cdn.shopify.com/s/files/1/0438/3975/0294/files/96854171504.pdf
    • https://cdn.shopify.com/s/files/1/0436/6457/2569/files/34840585331.pdf
    • https://cdn.shopify.com/s/files/1/0428/1748/7011/files/jadawuwidiwufiromakagavif.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_off0000620b.bin
6b356e97fe6c70084601a197f74a5874e2224c431d2a98214560e510ce3ec0ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620B 4964 bytes
font_01_sfnt_off000072ce.bin
eac26300ffbfe71b4d2f9b0d101ab97e2e545f9520cec6d5de5e4180e43a49a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72CE 12012 bytes

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