Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb496ad4624a9443…

MALICIOUS

PDF

38.5 KB Created: 2020-08-30 18:33:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01be5ce45f3b4a9083c4745b21e0334f SHA-1: de973795ceb5abc2b62ec9c06e2124fdfdab3c00 SHA-256: fb496ad4624a9443fbaf434bf06cacba600df160986e04858b7c3dbdf3f779a0
152 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a game download, which is a common social engineering tactic. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=diner+dash+full+game+free+download', indicating a lure for potentially unwanted software or malware. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=diner+dash+full+game+free+download
    • https://cdn.shopify.com/s/files/1/0433/9331/9068/files/sajudogokexejeluwidu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9797/files/merge_intervals_leetcode.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/malformaciones_congenitas_tipos.pdf
    • https://cdn.shopify.com/s/files/1/0438/8821/4171/files/2006_ford_focus_repair_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/lijumaliworibozo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/far_cost_principles_guide_2017.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5624/files/68661967563.pdf
    • https://cdn.shopify.com/s/files/1/0435/9749/6477/files/conduction_band_and_valence_band.pdf
    • https://static.usrfiles.com/ugd/c618e9_f415b94a5da24758ad60671de8fc7d37.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6d535e08de14c388e95b2ff94021b16.pdf
    • https://static.usrfiles.com/ugd/2ac701_9a6e7353e37d4a688d3fd8276f0cf938.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c30d21a8b8c4586b5e78b68638c2b08.pdf
    • https://static.usrfiles.com/ugd/3b47cb_4405c3513f2848fab1ce86baa812154a.pdf
    • https://static.usrfiles.com/ugd/384ea4_68724e23b847414798c442d68418ade2.pdf
    • https://static.usrfiles.com/ugd/b8c837_0fd8446f6b5847ea8399067fa84bd8c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce6eef643ae1473992e4e40a475ccbc1.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_efeba21ded0d45ffbfcbe20f40841c5c.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_off000056a1.bin
e6041b629bf0ff5f78a1a27e0762d48aaf3a43d780994f3a1eeb6cfcb655554b
pdf-font-stream PDF embedded font (sfnt) at offset 0x56A1 5412 bytes
font_01_sfnt_off000068ee.bin
427a9a145de90c49a2c8f7a43f508692ea41b7b7eea809b83213e2a6bbe3851f
pdf-font-stream PDF embedded font (sfnt) at offset 0x68EE 10584 bytes