Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e843c507b6671b9…

MALICIOUS

PDF

39.3 KB Created: 2020-08-31 02:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 157b9a64f6f2d12097f2f29d991199a9 SHA-1: d09cb6966faf70bf5425bda6472ac5838f9d25e5 SHA-256: 3e843c507b6671b91196976c6d7d8060d5fcbab299f7aa94ff081ba277f3658e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

This PDF file contains a high number of embedded links, many pointing to Shopify domains, but one critical link to 'ttraff.ru' is flagged as a malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious link, suggesting it's the primary lure. The ML classifier also strongly indicates maliciousness. The overall pattern suggests a link-based phishing or redirection attack designed to lead the user to a compromised site.

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/wix?keyword=infecciones+del+tracto+urinario+pdf
    • https://cdn.shopify.com/s/files/1/0434/5610/2565/files/39558352612.pdf
    • https://cdn.shopify.com/s/files/1/0429/3859/7539/files/sosebejurisila.pdf
    • https://cdn.shopify.com/s/files/1/0437/2925/6602/files/holley_1850_3.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/logical_reasoning_topics.pdf
    • https://cdn.shopify.com/s/files/1/0436/9930/6650/files/ascanio_in_alba_vocal_score.pdf
    • https://cdn.shopify.com/s/files/1/0436/4517/3910/files/bards_tale_2.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/guvevamibotejaz.pdf
    • https://static.usrfiles.com/ugd/0adedf_8986809734224a4b865387ac8b5d73d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_004b04228d004325abd11dc9426fcc80.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_off00005b7b.bin
9af5239f508861608a56fd959be80b22b9cba41eebdb25551e2bd44ea5485ba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7B 5088 bytes
font_01_sfnt_off00006ccc.bin
448002a9081935c6c34b051ba5e60b9d8f985cbf2c7359b4c9a35e02d6c33ea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CCC 10520 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.