Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4579c7d95d7cdf5…

MALICIOUS

PDF

118.2 KB Created: 2020-08-03 12:52:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f1b1d4eafc06766e3c6ed512f0776a4d SHA-1: 21cbef7144d65fa0b305fbd0a837007ee58498a7 SHA-256: c4579c7d95d7cdf57845cf622fd5ce048969e1e5bfb9fe6023630a59ce8377b0
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and a URL that points to a known malicious redirector, suggesting the primary purpose is to lure users to malicious sites. No scripts were extracted, limiting the analysis of direct payload execution.

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=logica+e+algebra+de+boole+pdf
    • http://files.neslle.com/uploads/1/3/0/9/130969790/dizod.pdf
    • http://rowomijuw.cobrabaldgenetics.com/uploads/1/3/2/7/132712323/11051.pdf
    • http://netodij.southernaznorml.org/uploads/1/3/2/7/132740900/fiduz.pdf
    • https://cdn.shopify.com/s/files/1/0433/6726/8517/files/15194356248.pdf
    • https://cdn.shopify.com/s/files/1/0434/2087/6962/files/95791941576.pdf
    • https://cdn.shopify.com/s/files/1/0429/6730/2295/files/65496328326.pdf
    • https://cdn.shopify.com/s/files/1/0438/3516/2784/files/boralonudokozijafexi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/4263188579.pdf
    • https://cdn.shopify.com/s/files/1/0440/8688/6552/files/xaxaborelidozoxawuga.pdf
    • https://cdn.shopify.com/s/files/1/0435/5211/2804/files/22842349671.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/gatalusanipu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5638/8510/files/luwirexelawejar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xikidewutuxazumal.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/xazenakimumur.pdf
    • https://cdn.shopify.com/s/files/1/0431/3215/8116/files/26082598372.pdf
    • https://cdn.shopify.com/s/files/1/0429/8076/9951/files/rarupapeme.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016546.bin
fa5cee8837707a1b358e42ee76c602b562955fd1ee6e2b2fcdeac86170e63bfe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16546 5224 bytes
font_01_sfnt_off0001771f.bin
926dcc0b49051f96e797dabd1e9d27f5d89183bd6dea1d095df5239676e625aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1771F 17900 bytes
font_02_sfnt_off0001ae70.bin
247f11a1fe14fe1cc84387fa2b7544a048c944e86367799017b0d15e3e25c60f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE70 18336 bytes

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