Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca27b19ec563f04e…

MALICIOUS

PDF

62.3 KB Created: 2020-08-19 03:57:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d00a198256082405a874a6445d18a728 SHA-1: ed9f46c046f5b1281d35743d3c5f066b248eaadb SHA-256: ca27b19ec563f04e007b006fe4262efc2bc651b563402eafc8738e14cc0cd21b
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 a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=brother+movie+status', which is likely used to funnel victims to a phishing or malware-hosting site. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=brother+movie+status
    • http://files.thedigitaldogpound.com/uploads/1/3/1/3/131398236/0097539144370.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/libirisuxapisatevazov.pdf
    • https://cdn.shopify.com/s/files/1/0431/7980/2782/files/11861200720.pdf
    • https://cdn.shopify.com/s/files/1/0436/8472/4889/files/gezogifukinev.pdf
    • https://cdn.shopify.com/s/files/1/0433/8581/5190/files/5039926755.pdf
    • https://cdn.shopify.com/s/files/1/0449/3220/2651/files/wupuxawozulumanal.pdf
    • https://cdn.shopify.com/s/files/1/0433/5081/8969/files/marathi_kadambari_list_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4256/1445/files/tivawobekalixuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/varanomavumozomadeda.pdf
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/37565940434.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/zerebiwivorilulaxaxefad.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_off0000b8fe.bin
d30817f5b8a0fc82c95b6bacf78d673d1a50692cc6fe805ca148ab14802d6732		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8FE 5004 bytes
font_01_sfnt_off0000c9dd.bin
b7395482a7c771e58f423dc9c42daefaac9426df56de51fd422625789060637a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DD 10156 bytes

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