Malicious PDF — malware analysis report

Static analysis result for SHA-256 37cc9040e28d9274…

MALICIOUS

PDF

31.9 KB Created: 2020-08-22 15:58:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 718dc01393dc13e4cfcfeb0d93b856ec SHA-1: dd0af769fcfc348ab9c592ecc3064634d5aac9ac SHA-256: 37cc9040e28d92746b5aea9558cbd2ca2611dfc4c9e1a80c5bb8e8d5fe80ee5f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains references to the '2016 super duty towing guide' and the wkhtmltopdf tool, suggesting a lure document. The presence of numerous Shopify-hosted PDF links indicates a link farm designed to distribute malicious content or phish users. The primary attack pattern involves redirecting users to malicious infrastructure.

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.
  • 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.
  • 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=2016+super+duty+towing+guide In PDF document text
    • http://files.transitionsthoroughbreds.org/uploads/1/3/1/1/131164112/b19f0.pdfIn PDF document text
    • http://jatejoduz.theeherbdoc.com/uploads/1/3/0/7/130775997/18db9325.pdfIn PDF document text
    • http://files.intheblinkofaneyejewelry.com/uploads/1/3/0/7/130739016/zanarenetezenivo.pdfIn PDF document text
    • http://kazofivad.ipersian.org/uploads/1/3/1/3/131384169/4017700.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/1/0428/9835/8432/files/67142307476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5580/0739/files/75120141108.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2309/8279/files/sudorugigesimigewixuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/76479801787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/pezusorila.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vakijuxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/sopejutubanubuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/w9_for_nonprofit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/97490647397.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

Related samples 4

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_off000041fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41FA 5464 bytes
SHA-256: e5c11015fbbe7307eb5eefb99a6b38dfee9823f3022e91c7dd1c0a3f5ab4d3b6
font_01_sfnt_off000054bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54BF 8864 bytes
SHA-256: 9878350d6475f65790f369f728f5f708fe6a2392ec3621ef087afa2b3322d90c

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