Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8fa50410f6c2a4a…

MALICIOUS

PDF

38.6 KB Created: 2020-08-25 02:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 098fe3be460ea9bd66f5d5945a0352ff SHA-1: 0bead967306995d00f87b354fc45c07996631d07 SHA-256: a8fa50410f6c2a4af020b3d9e14f9de2f10ee60ca85785ee615639b367a59a47
152 Risk Score

Malware Insights

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

The PDF contains a link farm with 20 external PDF links, including a redirector to a malicious URL. The document body, though corrupted, contains the malicious URL and appears to be a lure related to Android security. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's designed to drive traffic to malicious infrastructure.

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/pify?keyword=android+9+secure+folder
    • http://files.beachcitywindows.com/uploads/1/3/0/9/130969764/jedasidelesixe.pdf
    • http://depaluse.zestcleanfloors.com/uploads/1/3/1/1/131164250/80d7af.pdf
    • https://cdn.shopify.com/s/files/1/0430/6763/7917/files/free_offline_amplified_bible_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/dikagerokezesogoliba.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/72343889959.pdf
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/vascular_anastomosis_technique.pdf
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/68057632804.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/75212948378.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5694/files/nexibenexukawiwotama.pdf
    • https://cdn.shopify.com/s/files/1/0433/2837/2904/files/zaxefoxavasos.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_off00005bcf.bin
edfd11145899241fb960c4300f72c0de595f3535626ed7a197c9b337979285a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCF 4948 bytes
font_01_sfnt_off00006cab.bin
0ca487de71c881b02453b31cd8217795b23f1a1fe2197b5a0a3a5be49c7693c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAB 9804 bytes

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