Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ff14532fb063e0…

MALICIOUS

PDF

48.7 KB Created: 2020-08-02 16:22:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df19187d3f9849abf0bde1480bd5f146 SHA-1: 78166955097c5bbd3066785ec8c833e6fa87b62a SHA-256: 51ff14532fb063e00786655dc1fedadb8a4a26e8ff9e27d9e15f9b00df766fe8
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body contains text related to 'osrs prayer training' and the malicious URL, suggesting a lure to a scam or phishing site. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates a likely attempt to lead the user to a malicious payload or phishing page.

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=osrs+prayer+training
    • http://files.albernibasketball.ca/uploads/1/3/0/8/130874520/a990011.pdf
    • http://files.caninejudged.com/uploads/1/3/0/7/130738675/febagifav.pdf
    • http://files.ofallonhillssubdivision.org/uploads/1/3/1/1/131163780/bubivajirugufup.pdf
    • http://files.deltaworkready.com/uploads/1/3/1/8/131856992/5ed6396f81ba.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/dudivatobibovubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/geligup.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/25825827210.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1288/files/tewaviparirurorazi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/50266250801.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/1261535930.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/sejagixif.pdf
    • https://cdn.shopify.com/s/files/1/0436/1686/2371/files/wii_ware_game.pdf
    • https://cdn.shopify.com/s/files/1/0432/2020/5726/files/25129104945.pdf
    • https://cdn.shopify.com/s/files/1/0432/5815/1072/files/24723691735.pdf
    • https://cdn.shopify.com/s/files/1/0435/3022/3775/files/bixelalotupaxawaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/posisexofosoniziraguka.pdf
    • https://cdn.shopify.com/s/files/1/0435/1708/3803/files/wejuwatovuwezobuvej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/59677855830.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_off0000817b.bin
84d5f5dc069a715667355b1db44564c4f0874aa7801ed91bf11ffda75091a984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x817B 5084 bytes
font_01_sfnt_off000092df.bin
f6c8bdf943f8311e367e9042c882f8df6a1edc4a74dbe559bd64ce965852c003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92DF 10396 bytes

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