Malicious PDF — malware analysis report

Static analysis result for SHA-256 2300070e6e75fd94…

MALICIOUS

PDF

43.7 KB Created: 2020-08-26 11:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24ce7bb058d8994c144aa8748c4c696f SHA-1: b58ae73445d44a912db634f9a4d9218368de98d1 SHA-256: 2300070e6e75fd946ef33c0c69b6359da14ddbde3cd1cb0ec46eb7a9ffc3b0e1
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious URL (ttraff.cc). This indicates a link farm or SEO poisoning attack designed to funnel users to malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious redirection link.

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=2005+suzuki+gsx600f+service+manual
    • http://files.arkansasteenagerodeoassociation.com/uploads/1/3/1/3/131379615/vojinosixojagulexen.pdf
    • https://cdn.shopify.com/s/files/1/0428/9367/2604/files/25707672592.pdf
    • https://cdn.shopify.com/s/files/1/0430/8641/3985/files/42421358982.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/zinajoresiri.pdf
    • https://cdn.shopify.com/s/files/1/0435/3140/3423/files/pezawalegunejivelusagiw.pdf
    • https://cdn.shopify.com/s/files/1/0455/6773/8021/files/at_t_u_verse_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/6642/3456/files/league_of_legends_stuck_at_authenticating.pdf
    • https://cdn.shopify.com/s/files/1/0428/3265/8588/files/woxitasani.pdf
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/factory_reset_android_nextbook_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/9967262181.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000541c.bin
733c94d9c264e3048245a9333286fa98b10bc9ab41e9fc4105dc72b993bd1ae0
pdf-font-stream PDF embedded font (sfnt) at offset 0x541C 5592 bytes
font_01_sfnt_off0000670c.bin
1d185fe14cb0c1217ad06cd2626ac86a4c2352435b376de244b5cc4eefb753a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x670C 14484 bytes
font_02_sfnt_off0000942f.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x942F 4324 bytes