Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4000366e58a8fa…

MALICIOUS

PDF

48.8 KB Created: 2020-08-03 00:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fff07f3224491b028348a64fe9eb6a2b SHA-1: e377d2a769addee7cb428a81787a84dffef53895 SHA-256: 4a4000366e58a8faebf517f85a324bb9f5938ea1544db793bdaebb5d374d3bea
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF file contains a significant number of embedded links, many of which point to a known malicious redirector infrastructure. The document body contains text that appears to be a lure related to 'Stardew blacksmith or prospector', and the primary malicious URL is https://ttraff.ru/pify?keyword=stardew+blacksmith+or+prospector. While many other links point to Shopify, which hosts benign PDFs, the presence of the malicious redirector is the primary 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.
  • 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=stardew+blacksmith+or+prospector In PDF document text
    • http://files.blindsidecounter.com/uploads/1/3/2/6/132683330/6b3f59121e.pdfIn PDF document text
    • http://files.sacredfireacupuncture.com/uploads/1/3/1/6/131607467/pituvilox.pdfIn PDF document text
    • http://files.ragetoknow.com/uploads/1/3/1/3/131383456/rovuguvagat.pdfIn PDF document text
    • http://files.friendsofthefergusonforest.ca/uploads/1/3/0/8/130874063/tuson-vosesemajuf-wasatofadivi-togutuzekizi.pdfIn PDF document text
    • http://files.nathanpetek.com/uploads/1/3/1/8/131859370/5657521.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/1/0432/4642/0132/files/tubozog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5031/1579/files/penosud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7610/5893/files/29891782257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1248/8343/files/82545044280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/58296561446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxepetumikikexozifaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3668/0102/files/54693017015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5997/9174/files/36913331251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4386/3198/files/how_to_find_slope_from_two_points.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 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_off00008046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8046 5712 bytes
SHA-256: f58177a441163df827143147124f0bcca21b96c971abd598a299da0a4b161e89
font_01_sfnt_off00009399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9399 10200 bytes
SHA-256: 84b6500516e088f44c2593fac69c43c9675118f437bda2d73e1b78f2aaf2dc53

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