Malicious PDF — malware analysis report

Static analysis result for SHA-256 c265f07c5b96e529…

MALICIOUS

PDF

47.7 KB Created: 2020-09-01 02:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f1b3d46d72d0c201e45467e8356d35f SHA-1: 9a91e2378184087bb93faccecd63538d8947a224 SHA-256: c265f07c5b96e529484d95af904ae2f9f6be1db80bba29b4279051fcad5067f4
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=top+10+android+games+online+2018'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, also contains this URL and other links to PDF files hosted on Shopify, suggesting a link farm or SEO poisoning tactic to attract victims. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=top+10+android+games+online+2018
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/woparimefegezemavesif.pdf
    • https://cdn.shopify.com/s/files/1/0439/4146/2174/files/25984015971.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3413/files/kalakoka.pdf
    • https://cdn.shopify.com/s/files/1/0430/9050/9977/files/chennai_bass_song_pagalworld.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3229/files/41055245034.pdf
    • https://static.usrfiles.com/ugd/a771bd_d749f16ea6624050a2e865cc905f51c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_0b631993c6244b6d967a658805543a77.pdf
    • https://static.usrfiles.com/ugd/191a6d_68198cbce1e2461688d313d629a31ed2.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/penawunudaxa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/76093519632.pdf
    • https://cdn.shopify.com/s/files/1/0431/7167/6314/files/tafemipilasaxofanimomam.pdf
    • https://cdn.shopify.com/s/files/1/0440/6158/9669/files/setup_miracle_thunder_edition_2._98.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/wowipoge.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/full_shrimad_bhagwat_geeta_in_gujarati_free_download.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_off00007b47.bin
f37b2b5d3066d32e5141af2330abb1d8c0829225064b6837e921a55ad0b66f7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B47 5748 bytes
font_01_sfnt_off00008ec3.bin
2d69424003b435da934c0b0ddd63c0a04f027f38fe34d49ff503e03b343863db
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC3 10388 bytes