Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c62a124bb3826fc…

MALICIOUS

PDF

40.8 KB Created: 2020-08-26 15:40:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce6f9f51aea25256891b9d68fc87aa06 SHA-1: c96ecae6edd85a2aecaea07fc90cbfce97524ae3 SHA-256: 4c62a124bb3826fcdbc4907657969d987ad72efd9c86f6cecead620987b14a80
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link directs to a known malicious redirector at ttraff.com. This indicates a phishing or malicious redirection attempt, likely to distribute further malware or lead users to scam pages. The ML classifier also strongly flagged this PDF as malicious.

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=apocalipsis+biblia+resumen
    • http://wekede.forestparkcorpcenter.com/uploads/1/3/1/4/131407089/08d87da3.pdf
    • http://files.pfmwv.com/uploads/1/3/1/8/131856827/vosesamogit.pdf
    • https://cdn.shopify.com/s/files/1/0433/5930/5880/files/facebook_marketing_blueprint.pdf
    • https://cdn.shopify.com/s/files/1/0431/4936/1314/files/2448641363.pdf
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/mawaxoguwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/what_is_com._lge._launcher3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0437/6081/2189/files/poximovupilojivifem.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/brendan_gregg_systems_performance.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/zofunas.pdf
    • https://cdn.shopify.com/s/files/1/0436/4953/2069/files/38446205219.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3635/files/46798380685.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_off00006270.bin
6a3bdaa4e2fbe2babb4fa82ead45b6efbbfda753f2efd92a479ebd1f5235a47d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6270 5208 bytes
font_01_sfnt_off000073ff.bin
ffe0a1d8d251eea7fe0cb5cbf9b0758d7892193201ec44f2526058736f5a195a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FF 10296 bytes

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