Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b7642f9254f0f2f…

MALICIOUS

PDF

45.4 KB Created: 2020-10-10 21:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 49d92d001ced753e42172f2712a59eca SHA-1: 7357afd0d996dd91ee40314f7baaf35a0e253e25 SHA-256: 3b7642f9254f0f2f1feb6cac6a385aefd56dd27ba1bf2e02dc330d8a33de568f
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains and a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure related to "Taco bell menu pdf uk" and includes URLs that are part of a link farm. The ML classifier strongly indicated maliciousness, and the presence of redirector links suggests an attempt to lead the user to a malicious site for phishing or malware delivery.

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.
  • 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.club/pify?keyword=taco+bell+menu+pdf+uk In PDF document text
    • http://files.terrafirmaroasting.com/uploads/1/3/0/7/130776001/mosabopezasuzobu.pdfIn PDF document text
    • http://files.beehavenflowerfarm.com/uploads/1/3/2/3/132303239/cbf59060888aeb.pdfIn PDF document text
    • http://files.longlivethedogs.com/uploads/1/3/1/0/131070845/tidadezifujukomonaz.pdfIn PDF document text
    • http://files.disturbed-girl.com/uploads/1/3/1/6/131636845/tolowojusetum_xajiliwezod_dupaja_kubibut.pdfIn PDF document text
    • http://files.quadrium-aerospace.com/uploads/1/3/1/4/131437889/zobevegosediji.pdfIn PDF document text
    • https://site-1039802.mozfiles.com/files/1039802/10593348516.pdfIn PDF document text
    • https://site-1038702.mozfiles.com/files/1038702/98384753167.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/podizizefuk.pdfIn PDF document text
    • http://files.gamain.gaflint.org/uploads/1/3/2/8/132815206/4097920.pdfIn PDF document text
    • http://files.elginparkathletics.com/uploads/1/3/1/4/131406413/xikudenaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006a94.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006a94.bin)
    • https://uploads.strikinglycdn.com/files/62e1bb17-9294-4824-82a8-9d7d98939cc7/luzig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9560a15e-8ff6-4933-ab4f-ab577e070f23/luduwumuvixigejif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d97d3d4-4c6a-4d33-8307-035deb7eca6b/musubogisegokulaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5417d87-b45c-4e33-bad2-0c15b255a392/ponatunofubeguxotub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f79e78f1-3e18-49e5-99bf-f550605e1c21/34673562953.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 extracted file (font_00_sfnt_off00006a94.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A94 5180 bytes
SHA-256: 1af162fbd1b5c27300e11fdb43a006361fdd2479f61db69ea7fd2d60d68c8dfc
font_01_sfnt_off00007c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1F 14340 bytes
SHA-256: b6e540211da167b4d9eb37008d1c1866e548475725c5a6a7c9a2cddef97f86e9

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