Malicious PDF — malware analysis report

Static analysis result for SHA-256 19a1227d7dea7953…

MALICIOUS

PDF

44.8 KB Created: 2020-08-03 21:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fdbf242876af84471bc573179687275a SHA-1: ff178fe8c4d3d7ed2ff72d2effca9705d4a938b8 SHA-256: 19a1227d7dea795392f8e3a95566cc5cf4a7174b49ee31951a47d2cdd38f5973
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or SEO spam campaign, aiming to drive traffic to malicious sites.

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.ru/pify?keyword=ammonia+in+drinking+water+pdf
    • http://files.normanmuseum.org/uploads/1/3/1/4/131482919/tiketedujomoganosuz.pdf
    • http://files.emmagardner.com/uploads/1/3/1/0/131069812/muwomenidodobov_gamasosepovowu_tufozaxigip_vujufimiwozi.pdf
    • http://files.matthewjacksonart.com/uploads/1/3/1/8/131857717/kojaro.pdf
    • http://files.mx.youngstaekwondo.net/uploads/1/3/0/7/130739387/7151198.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/sonov.pdf
    • https://cdn.shopify.com/s/files/1/0440/7784/2584/files/64455223541.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2040/files/sijago.pdf
    • https://cdn.shopify.com/s/files/1/0438/3830/8512/files/5792588156.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6669/files/11789124362.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31178329868.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/rovof.pdf
    • https://cdn.shopify.com/s/files/1/0432/9940/5977/files/64064591386.pdf
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/poulan_chainsaw_fuel_line_routing_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0439/6626/7550/files/ets_toefl_ibt.pdf
    • https://cdn.shopify.com/s/files/1/0432/4940/2024/files/40679588216.pdf
    • https://cdn.shopify.com/s/files/1/0440/7066/6390/files/berigofagim.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/35928828167.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9479/files/molebudoninunene.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_off00007225.bin
e4fcc730c5be94fd011ee8510c6d86d63d1ac00cc7e7187e8667cb171d1cd832		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7225 5296 bytes
font_01_sfnt_off00008426.bin
3cd167d6ead35eef262f2320dcb1c1e0de26eb0d3949a9540d9a41e457b94306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8426 10020 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.