Malicious PDF — malware analysis report

Static analysis result for SHA-256 390929acd63b5a9a…

MALICIOUS

PDF

43.8 KB Created: 2020-08-29 20:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f88a89ff0b573b935f8e8d4f179909e SHA-1: d0a3468f3a5f9e1aaa6d5d4310981a6e2d659314 SHA-256: 390929acd63b5a9ae1ac16474be69b4eecd7f1936c8f288d91612da3ddafdd77
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to sheet music, likely used as a lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM strongly indicate a malicious intent to redirect users to harmful content.

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.me/wix?keyword=canon+in+d+major+johann+pachelbel+piano+sheet+music
    • https://static.usrfiles.com/ugd/b8c837_78f7a6f0881a4487a911c0985caa0178.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc25def020a549a4badb8957350bcc05.pdf
    • https://static.usrfiles.com/ugd/87a178_b0f43caccd38415989def52d491ad5a6.pdf
    • https://cdn.shopify.com/s/files/1/0448/4064/8861/files/alchemist_code_rerolling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0455/2966/1605/files/thermal_breeder_reactor.pdf
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/xovidilosodat.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kesutuzijakakewinepubad.pdf
    • https://cdn.shopify.com/s/files/1/0431/0676/2905/files/gangstar_city_game_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7492/0347/files/63854117122.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/p90x3_classic_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/wordly_wise_3000_book_8_lesson_6_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/ketopiwidupanufozavojetor.pdf
    • https://cdn.shopify.com/s/files/1/0436/7928/5401/files/58794144011.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0904/files/4721974386.pdf
    • https://cdn.shopify.com/s/files/1/0435/4372/4186/files/23401531645.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/30899714004.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_off00005e1c.bin
08eaf28d36264ab3f7ea498fcaf32b9229e403facf271adfadfef2781e098049
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1C 5436 bytes
font_01_sfnt_off00007066.bin
703a2f395e76f4b9615516a9807bf0eeebd3b1a28cf561e1ce455e832c43141d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7066 15092 bytes