Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3bdc0bebcac8e37…

MALICIOUS

PDF

37.8 KB Created: 2020-10-12 08:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a603bfaa07b026af56a9c07b1812cb21 SHA-1: 6944ff4747e173b69c7143ba182006aef4a7cdb6 SHA-256: a3bdc0bebcac8e37e12e4f89282a8d7939a92ccb749d832292fd129dc0b90502
124 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, specifically 'https://ttraff.link/pify?keyword=guadalupe+county+nm+jobs'. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/pify?keyword=guadalupe+county+nm+jobs In PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/26014924166.pdfIn PDF document text
    • https://site-1048531.mozfiles.com/files/1048531/28336177071.pdfIn PDF document text
    • https://site-1036742.mozfiles.com/files/1036742/78731400641.pdfIn PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/godewed.pdfIn PDF document text
    • http://kogiris.radarresearch.com/uploads/1/3/0/7/130775612/zazibisatamoset-pojinekatobes.pdfIn PDF document text
    • http://files.drydenmontgomerypark.org/uploads/1/3/0/8/130814466/xuzivapekewigir-vemebafesoxizeb-dazoredosubebit-mipebawiwunilef.pdfIn PDF document text
    • http://files.wicathletics.com/uploads/1/3/1/3/131380707/ae9097f6.pdfIn PDF document text
    • http://durereru.infusionbaroque.com/uploads/1/3/2/8/132814930/9840819.pdfIn PDF document text
    • http://files.the-design-source.com/uploads/1/3/1/4/131437312/tikutisixazamunoxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/3288/7463/files/miwamoludozegunubefadumag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/9373/7886/files/baxojosewazuvifojunujeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8281/8751/files/wegopobuj.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000549b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549B 5472 bytes
SHA-256: f1b6bed7c07f75df043773528f59f61f05615ecf537c0703db4715365787be10
font_01_sfnt_off0000672d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672D 10316 bytes
SHA-256: b08996e84b71d4306f053b3a744bda87d634a220ed562d309095cbf4aac121b3

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