Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d934fa6d60f544b…

MALICIOUS

PDF

42.6 KB Created: 2020-08-10 07:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0b71c4c1a8af6d068967244f782322ee SHA-1: 7490442bbd12219b979629061f23404fc196f216 SHA-256: 3d934fa6d60f544bbcf6363eb2464a0c55a70c9f8d054617e35a6339a2e2f309
202 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is associated with SEO spam and phishing lures. The document body, though heavily obfuscated, contains text related to 'adobe pdf reader offline installer for windows 7', suggesting a fake software download lure. The presence of a 'download button' heuristic further supports this, indicating the document is designed to trick users into downloading potentially malicious files. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=adobe+pdf+reader+offline+installer+for+windows+7 In PDF document text
    • http://xomeguti.ideaventionsacademy.org/uploads/1/3/0/7/130739777/30b102e.pdfIn PDF document text
    • http://galam.mx.campingasseiceira.com/uploads/1/3/1/4/131453284/diwolijabopex.pdfIn PDF document text
    • http://files.baileeauna.com/uploads/1/3/0/7/130739202/vajenotob.pdfIn PDF document text
    • http://files.regulatorycounsel.net/uploads/1/3/1/3/131380985/7a05c4f6c.pdfIn PDF document text
    • http://nabefes.mauimadison.com/uploads/1/3/0/8/130815017/kegipowukufufis.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/1/0434/3028/1381/files/modele_avenant_contrat_de_travail_modification_salaire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7694/3000/files/iphone_5c_schematic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/45463197179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18396470220.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6582/6719/files/62245602642.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4008/6935/files/88683876611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8421/0583/files/oye_como_va_lyrics_translation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/omc_stringer_outdrive_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/tezafagegoxurezokosof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/55192983213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6624/4766/files/79683879666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52657742202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/lean_six_sigma_green_belt_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/fixumotoforakazanofutel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/70676914270.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_off00006844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6844 5336 bytes
SHA-256: 7389eb01f2e67f663da296ac46c26186dfb67521f6bb93678493c12ce4433e90
font_01_sfnt_off00007a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A88 9900 bytes
SHA-256: 968c1e3c83ac212454fe802e57710eb9a49b4eefca727dc211beee6c7bd76f03