Malicious PDF — malware analysis report

Static analysis result for SHA-256 e476075703d04b79…

MALICIOUS

PDF

44.0 KB Created: 2020-08-30 05:31:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef996725323fcb94f8da76d8e0955ba8 SHA-1: cda60ccf8962233c21c121a0dc40654743ff04c0 SHA-256: e476075703d04b7973fd3714f85951e2b63c5b81e4149160fecab35ec89382b9
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/wix?keyword=proteus+empires+and+puzzles', is flagged as a known malicious redirector. The presence of a link farm and a malicious redirector strongly suggests an attempt to lure users to malicious websites, likely for phishing or malware delivery. The ML classifier also flagged this PDF with high confidence.

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=proteus+empires+and+puzzles
    • https://static.usrfiles.com/ugd/7e6083_cdf1ab3bbc214265bb5c1c6cb869beef.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ad9e121e30941b399d137c18de57ba9.pdf
    • https://static.usrfiles.com/ugd/599026_4c1136bf3f964f28b8f3fcfe97666751.pdf
    • https://static.usrfiles.com/ugd/b8c837_7910ecf8492747a98f9ddf053568d30e.pdf
    • https://static.usrfiles.com/ugd/b8c837_88ca40505ca84e849957cd6520c240bc.pdf
    • https://static.usrfiles.com/ugd/12f4eb_aea8c6dea5424d679303c8caa5b2066d.pdf
    • https://static.usrfiles.com/ugd/cd79e3_5879a37f96074f12bf49069fd0a9aefd.pdf
    • https://static.usrfiles.com/ugd/234f58_0d4b1e80315d4deaa1d4d3a758487363.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_3477e800a2a84f91bec1fa4058e7f8d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e175e5fc7a024085aeb4e680d025616e.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5800/files/41471871285.pdf
    • https://cdn.shopify.com/s/files/1/0431/4732/9702/files/42747347589.pdf
    • https://cdn.shopify.com/s/files/1/0434/4755/0119/files/50383817067.pdf
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/zuzazisa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6293/files/78e1cd88-_49e3-_476e-_b926-_580e596ad309.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_off00006d62.bin
e47cdd0f0e7ab044b1a778f1d53795bc340f3f56318fac7ddb564b1c5182b4f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D62 5156 bytes
font_01_sfnt_off00007ed2.bin
6efa6112c0c563088b2b428757b2bb6ae2ead3e07b7e70fd5f14a88376fbc7e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED2 10616 bytes