Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f4cc01e74373cd…

MALICIOUS

PDF

43.0 KB Created: 2020-08-05 15:20:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3609feb78d9765d2c34a8ad1161be0d8 SHA-1: 43903ee5c07150b0a0127f3ac3496b26fde6059d SHA-256: c1f4cc01e74373cd1644fca79b6bebc7018c2d2e80dd528fa6593dcfeb08e20a
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it's a malicious redirector link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=5+kingdom+system+of+classification+pdf. The document body, though heavily obfuscated, contains references to the same classification topic and the malicious URL, suggesting a phishing or scam lure. 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=5+kingdom+system+of+classification+pdf
    • http://files.kawh3.com/uploads/1/3/1/8/131871705/129933.pdf
    • http://files.cccrw.org/uploads/1/3/0/7/130739353/ae70804c.pdf
    • http://repabevo.anglicanmanifesto.com/uploads/1/3/0/7/130775734/264395.pdf
    • http://rasewika.michelleyounghares.co.uk/uploads/1/3/1/4/131406715/7485762.pdf
    • http://texive.rogueemergencypreparedness.com/uploads/1/3/1/4/131483281/4398769.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/45528064999.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9805/files/94627345649.pdf
    • https://cdn.shopify.com/s/files/1/0440/2230/0822/files/75164499120.pdf
    • https://cdn.shopify.com/s/files/1/0437/9338/3585/files/golog.pdf
    • https://cdn.shopify.com/s/files/1/0440/0663/7726/files/79754290762.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/15087836349.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/buxugeloputejo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5232/7324/files/bufamiwotav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7441/1926/files/72947157269.pdf
    • https://cdn.shopify.com/s/files/1/0430/9588/3925/files/ratiwalovoxadegoze.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/xugera.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/kofano.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/
    • https://cdn.shopify.com/s/files/1/0435

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000695c.bin
7a92cc231b31fc7c82dd04dfe689b4d54bbce750c12ab5fc10020a6edf462030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x695C 5572 bytes
font_01_sfnt_off00007c5d.bin
57744fbe4abfe3e011c6d50e6e8552f28f2605bdfd39c29a74a2cc5a1cc5c690		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5D 10148 bytes

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