Malicious PDF — malware analysis report

Static analysis result for SHA-256 8594b83a6eb099bc…

MALICIOUS

PDF

46.9 KB Created: 2020-09-06 07:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 954d5a5060d46a51be7e477c200a3cf9 SHA-1: 977fe9f4fcc32dc3da3c4c72bec60b0763da3e68 SHA-256: 8594b83a6eb099bc227c86fc9ace79e7b08ed8e492ee56865771415e2c0608fe
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an installation guide, aiming to trick users into clicking it. The presence of a large number of external links, many of which are benign, suggests a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly indicated maliciousness, and the redirector link is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.link/wix?keyword=scv3020+installation+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f9fac6_465a8954c38d4b7f8153e329943989d6.pdf
    • https://static.usrfiles.com/ugd/37321e_95dc9942d907491494314c456217d52f.pdf
    • https://static.usrfiles.com/ugd/b8c837_9669b8b0107946d5bfaa1122ed11c891.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/construction_project_plan_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9240/files/28386740149.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/95810867102.pdf
    • https://cdn.shopify.com/s/files/1/0454/3581/4046/files/gofumiboviporidelona.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/gewupa.pdf
    • https://cdn.shopify.com/s/files/1/0433/8325/9301/files/cateterismo_vesical_intermitente.pdf
    • https://cdn.shopify.com/s/files/1/0436/0480/3746/files/enzyme_based_biosensors.pdf
    • https://static.usrfiles.com/ugd/77941b_4b6c4a85b30e43efa034bbefbadd4564.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae06218149b2448b9d8164d7cf604aa0.pdf
    • https://static.usrfiles.com/ugd/822ecd_36facd617f2f4931ab482cf3bdf527b9.pdf
    • https://static.usrfiles.com/ugd/405339_9fbd38dfe8694e76987c7043f41d52c8.pdf
    • https://static.usrfiles.com/ugd/a3b54b_ff30bb0eab5e4162943b4cbe14f679b4.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_off00007a0e.bin
12e74d21e011994f4e671644a6afcab15aa59c08c50cb6f202a70cf033f934ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0E 5612 bytes
font_01_sfnt_off00008d34.bin
a118c5ef3cda07f1cb01050dd068053c432295d0ddccfea9e8d39dd28a4b4458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D34 9860 bytes

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