Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc4ab7a77f53db5…

MALICIOUS

PDF

37.8 KB Created: 2020-08-02 18:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb9ecff86618523b9476d9bf10339450 SHA-1: 2872aae2cd8b03196465f3aa9374df59a1e31d58 SHA-256: fbc4ab7a77f53db507015706c3f7bd176537367451a2bda8a8d76dbe1339b626
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, suggesting a phishing or redirection attack. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=wreck+it+ralph+sex
    • http://files.rockthecatspa.us/uploads/1/3/2/6/132696249/bilasusesawude.pdf
    • http://files.rossdillon.com/uploads/1/3/0/7/130775565/zaziwapidobenuje.pdf
    • http://files.g99photography.co.uk/uploads/1/3/1/4/131407263/3fdfb8.pdf
    • http://files.legendsathletictraininggym.com/uploads/1/3/0/7/130776812/2406f5d3.pdf
    • https://cdn.shopify.com/s/files/1/0430/7818/9205/files/xolajok.pdf
    • https://cdn.shopify.com/s/files/1/0431/8380/0474/files/bellman_ford_algorithm_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/74078617381.pdf
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/kibejakonilo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/25671752229.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2264/files/5347521895.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/51513778466.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/62591418423.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/93604618824.pdf
    • https://cdn.shopify.com/s/files/1/0431/0607/4780/files/16881344498.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84602765162.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/acs_organic_chemistry_practice_exam.pdf
    • https://cdn.shopify.com/s/files/1/0435/8340/6239/files/85877784551.pdf
    • https://cdn.shopify.com/s/files/1/0427/7790/3263/files/32893019831.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_off00005626.bin
40ef555b560cb6081832245d81eb0c9b03211355f64e4e05fdaf959630c9f894		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5626 5164 bytes
font_01_sfnt_off000067c7.bin
feeb7bf17b61e7b42cbe0dda3dc0809e4356c3b44bd8fbae87560bffad498bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67C7 10176 bytes

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