Malicious PDF — malware analysis report

Static analysis result for SHA-256 361e30f252bb54ac…

MALICIOUS

PDF

42.2 KB Created: 2020-08-24 12:59:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3fd397a3a50aa8d108a39677f796bff SHA-1: 8472251e8dbb8841919a5114843461d16f69a9b6 SHA-256: 361e30f252bb54acec34e5159c6dbcd6fcf567ae095097701068ac6b549c83b8
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded URLs, with a critical heuristic identifying it as a malicious redirector link farm. The primary URL, https://ttraff.com/pify?keyword=dark+souls+remastered+guide+switch, is likely used to obscure the ultimate malicious destination. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the sheer volume of links and the use of a redirector suggest a phishing or scam attempt.

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=dark+souls+remastered+guide+switch
    • http://zesavo.sunsethoa.com/uploads/1/3/1/4/131408103/cbee74.pdf
    • http://files.spaghettifactory.net/uploads/1/3/0/7/130775665/f8b350f6736ff.pdf
    • http://files.dealbypallet.com/uploads/1/3/1/8/131856158/155fa77a0ec635.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/34946059474.pdf
    • https://cdn.shopify.com/s/files/1/0432/5376/0162/files/salegojom.pdf
    • https://cdn.shopify.com/s/files/1/0450/1933/2766/files/all_candlestick_chart_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/67460698969.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3635/files/dogum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/download_embedded_vimeo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8380/9443/files/cluster_headache_treatment_guideline.pdf
    • https://cdn.shopify.com/s/files/1/0431/8098/2436/files/guvivibixuxufode.pdf
    • https://cdn.shopify.com/s/files/1/0434/2838/0839/files/7128910296.pdf
    • https://cdn.shopify.com/s/files/1/0437/2440/6935/files/sovodakulebedetogax.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/four_temperaments_questionnaire.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_off000065f7.bin
1c7f02284ac4f3437ce0b8f396d6b2c8079d14007b716107f67d7c0343362dc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 5508 bytes
font_01_sfnt_off000078a2.bin
a58b41e41e7bfeec4bae998c77d409ad802bd14bca939c546957238d17bbdd69
pdf-font-stream PDF embedded font (sfnt) at offset 0x78A2 10360 bytes