Malicious PDF — malware analysis report

Static analysis result for SHA-256 717b1a3f04e35be8…

MALICIOUS

PDF

36.7 KB Created: 2020-08-08 00:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a00e69766fa75e57600dd6060fe55ecd SHA-1: 85366388fcd03428792e1e0ce37198a554501717 SHA-256: 717b1a3f04e35be8688bd80af59dd09ab189678aca4f1306f884085ce629351f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a malicious redirector link disguised as a user manual, aiming to trick users into navigating to a potentially harmful site. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

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=skoda+amundsen+bedienungsanleitung+pdf
    • http://files.safetyexcellence.org/uploads/1/3/0/9/130969826/zuvukuwotojij-suwop.pdf
    • http://buneja.bhlexvolunteers.com/uploads/1/3/1/4/131408056/3446806.pdf
    • http://files.thepisceannomad.com/uploads/1/3/1/4/131438418/zilurafidok.pdf
    • http://files.colinbradleymeyer.com/uploads/1/3/0/9/130969654/kuveravos_domudowevabetur.pdf
    • http://files.drinayatullah.org/uploads/1/3/1/1/131164236/4407319.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/catalog_interior_design.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/wii_u_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/94623495665.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0728/files/jetenadoduduterefogurunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/beguwi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/palevurunezukazokogeleg.pdf
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/xamaxokajar.pdf
    • https://cdn.shopify.com/s/files/1/0429/7654/2873/files/best_annotation_software_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0435/7426/3963/files/5898257390.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/posowawemikorenetirobomok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60359225188.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e6d.bin
1bf9ee895b2f90524e2dac9d10c7e729721af798d917cf147a32f297957ed4bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4E6D 5572 bytes
font_01_sfnt_off00006155.bin
a681f40fe38d63c91bf542c422ea333abbaea8bdb8869ebd01915ccf5d5cb30c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6155 10540 bytes

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