Malicious PDF — malware analysis report

Static analysis result for SHA-256 34ca475231a8a192…

MALICIOUS

PDF

36.4 KB Created: 2020-08-30 04:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 194bfbc832a0cf20cb27c0924235a16b SHA-1: a09d04fb131a0cf1770082de318a0a33bc728f6c SHA-256: 34ca475231a8a1923cb1a542118afdf819c331ca599b53b3656df5ad4589a82a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'pdf architect professional free download' and a URL that appears to be a lure. This suggests a social engineering attack aiming to trick users into clicking the malicious link, likely to download malware or be redirected to a phishing site.

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/wix?keyword=pdf+architect+professional+free+download
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/kigepagab.pdf
    • https://cdn.shopify.com/s/files/1/0436/0133/0340/files/28318466973.pdf
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/journal_of_family_business_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenipuwewof.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/71037529079.pdf
    • https://static.usrfiles.com/ugd/e1c37d_596eb3052ff14e68a67f87c8d15f4369.pdf
    • https://static.usrfiles.com/ugd/63022f_22524a0793b14403a7bb2a69b67f6b81.pdf
    • https://static.usrfiles.com/ugd/cec570_fe79cef9daf2413f9ed54769fe69c8b8.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_54f0191420f8430cba7dd83f0cb81d3c.pdf
    • https://static.usrfiles.com/ugd/b47706_0c9ef6c0277f4bdb900ac8dd6c372176.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_off00004fe9.bin
9019b13d8867b7421cc732e4a2a78c18e47353d209ed803d6a32ab40afc40dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FE9 5336 bytes
font_01_sfnt_off00006214.bin
d396e379df4dcc96c1d3414f984be189850343925084658b2539593243fcd2f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6214 10388 bytes

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