Malicious PDF — malware analysis report

Static analysis result for SHA-256 4090559200bf25c1…

MALICIOUS

PDF

34.5 KB Created: 2020-08-03 09:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d95b3f926b6744a3e9952fecc359579 SHA-1: 8787d58ca835245339e2b390c5348299311d062c SHA-256: 4090559200bf25c17b35b76d47c3dc6aff904b22c274d559e6df94ca5b912162
254 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to a redirector infrastructure. The document body text and heuristics indicate a lure related to 'Dakota county property tax statement', likely a phishing attempt to trick users into visiting malicious sites. The presence of multiple Shopify-hosted PDF links suggests a link farm used for SEO poisoning to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=dakota+county+property+tax+statement In PDF document text
    • http://files.daisymaeboutiqueshop.com/uploads/1/3/1/8/131871859/1998dbe32.pdfIn PDF document text
    • http://files.masoncitychristian.com/uploads/1/3/0/7/130740391/xigisupokijuwu.pdfIn PDF document text
    • http://files.betsyleebaileymusic.com/uploads/1/3/1/4/131437552/megumina-furabi-sagoribaropir-lugeki.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/1/0436/6237/7113/files/nalotis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/xowekiweserazajamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/75161755747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9437/4555/files/auto_tune_demo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3065/9750/files/70032230744.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8371/7015/files/xedomajorowutisana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5484/5352/files/raspberry_pi_cmdline._txt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0501/7255/files/10101038597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xatet.pdfIn macro / runtime command snippet
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/37178937306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1806/6842/files/guligitofizasiwugesekuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/67762340320.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
    • https://cdn.shopify.com/s/files/1/0434/0501In macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4967 5280 bytes
SHA-256: 9defa978ca90fa0aef8b5a4a8a14160bd2d5793a3b1acdee507e0a3c9b7ae44c
font_01_sfnt_off00005b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B60 9864 bytes
SHA-256: e0c451f78e984ac11822a497f169976aaa7fbde50de9ab0c698c2fb85c40827e