Malicious PDF — malware analysis report

Static analysis result for SHA-256 21f9ba13e98de33f…

MALICIOUS

PDF

41.0 KB Created: 2020-08-02 18:08:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 783d2887e6a5a4444bf2952f59c295a4 SHA-1: d0228219333f5dec1efdb6db7fc6240288c89932 SHA-256: 21f9ba13e98de33fb8857ddec77ce11b12ed7e711741b58e817e482fb0fbc9b4
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it's a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=sierra+bullets+reloading+data+pdf', which is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs pointing to various domains, including several Shopify-hosted PDFs. The primary malicious URL is likely intended to lead the user to a phishing or malware distribution site.

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.com/pify?keyword=sierra+bullets+reloading+data+pdf In PDF document text
    • http://files.darrenwilson.net/uploads/1/3/0/8/130813769/2500768.pdfIn PDF document text
    • http://files.usedmufflermachinery.com/uploads/1/3/0/8/130813301/ruxevagugel.pdfIn PDF document text
    • http://files.straightfromtheheartinc.org/uploads/1/3/1/3/131380292/6666583.pdfIn PDF document text
    • http://files.esproductions.net/uploads/1/3/1/4/131455636/nebozitegadon.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/1/0431/3425/5258/files/sukotarep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7790/1214/files/12119507840.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1742/1479/files/48743089662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5962/4606/files/96235910218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2655/3755/files/xiwaziwovevomojususave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/cents_to_dollars_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/nevegakesob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/94877560884.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/24149145069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/zufegod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1891/0870/files/37745248854.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
🗂 Part of campaign: straightfromtheheartinc.org 3 samples

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_off00006161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6161 5452 bytes
SHA-256: 732369afb6de79b65d63937a37bfba163176e91574c8d14b1090af702b33835b
font_01_sfnt_off000073ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73ED 10168 bytes
SHA-256: ba8e62e06e19f410442f033f6cb3343ae3dfbfa9a21f7c071107e3bfb9cdcf9c

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