Malicious PDF — malware analysis report

Static analysis result for SHA-256 793e25c7a6f3feda…

MALICIOUS

PDF

42.3 KB Created: 2020-08-20 18:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2b2a564b78411e467297c6738723c4b SHA-1: a669a6c90e4b500fab7f0b70360253f43b98cb8d SHA-256: 793e25c7a6f3feda9417588add16f0b0ad0106c5ed84f6131b85aa2ffefb419a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, many pointing to suspicious domains, and one critical heuristic identified it as a redirector link. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a movie download, suggesting a phishing or scam attempt. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ma+pass+full+movie+free++300mb
    • http://mopokilo.ksguns60478.com/uploads/1/3/2/6/132695643/sutitarisijojiwuge.pdf
    • http://vafixi.crossfitantrim.com/uploads/1/3/0/8/130874359/3ca53ec0c38ad.pdf
    • http://files.weekendsaround.com/uploads/1/3/0/7/130775653/8060464.pdf
    • http://peberore.sunshinecoastcounselling.com/uploads/1/3/1/4/131437906/8918879.pdf
    • http://fugisoxep.oscarxavierdelsebastien.com/uploads/1/3/1/4/131407089/paperidoxomemodogem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/39895053847.pdf
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/e7_8e_8b_e9_b8_a5.pdf
    • https://cdn.shopify.com/s/files/1/0429/4675/6774/files/lunekewu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0641/8331/files/game_snake_io_jar.pdf
    • https://cdn.shopify.com/s/files/1/0428/5782/4419/files/sogezinute.pdf
    • https://cdn.shopify.com/s/files/1/0447/2176/6556/files/advanced_transport_phenomena_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/0715/5110/files/ridopaxagodeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenipuwewof.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f87.bin
b3b0cef8cc75ecaa790f741294ac2c2b1c1f6b7a4adcf773cf88fc962b28bee5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F87 5556 bytes
font_01_sfnt_off0000725c.bin
154a36423393e1157d9900a7173149b0718732de5178949817ef95ef8fff2908		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725C 13364 bytes

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