Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4d7a6d6a46ffd1d…

MALICIOUS

PDF

38.8 KB Created: 2020-08-09 21:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f58a3589a56e448daaeb486c7e2f61fc SHA-1: e358de2b7bbf48f6d8ec343ff456d40e761f384a SHA-256: c4d7a6d6a46ffd1dd304d507c89121aa2629e961521bc5c0b8dc4d2119596493
152 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ttraff.com. The ML classifier strongly indicates maliciousness, and the PDF structure suggests a link farm designed to lure users to malicious content. The document body, though heavily obfuscated, contains the primary malicious URL.

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=ayushya+homam+mantra+tamil+pdf
    • http://tiwatume.aemtyouth.net/uploads/1/3/2/8/132814930/4953509.pdf
    • http://befak.kateradartist.com/uploads/1/3/1/4/131453870/295e368.pdf
    • http://files.vivafitsb.com/uploads/1/3/2/8/132815003/kulugorefosudazi.pdf
    • http://files.redcardevents.com/uploads/1/3/1/6/131607232/sukeloguwak_vebiwibolu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6857/1294/files/48901615704.pdf
    • https://cdn.shopify.com/s/files/1/0440/4379/6645/files/bluetooth_4._0_specification.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0654/files/dolalo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/vazimaxidukugizo.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/99824869481.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6533/files/problems_facing_african_historiography.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/sobitanowaxu.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7430/files/tetafelag.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/minecraft_xaero_s_minimap.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/zoremoxobapasefuketuxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/18039705400.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/2014_subaru_outback_maintenance_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0430/0154/4863/files/37714617336.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_off000058c3.bin
a054d467d3e4fc2aa2cddbf470f4ada405d7b4c5a1519d9607ce8bde40fa878a
pdf-font-stream PDF embedded font (sfnt) at offset 0x58C3 5372 bytes
font_01_sfnt_off00006ae8.bin
8703b4cb95514b15543eea62c20c8f9a57add2b3387d88ac844c131dbbc2f736
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE8 10352 bytes