Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1d92d4fa7c16e5…

MALICIOUS

PDF

52.8 KB Created: 2020-08-12 21:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8a41f6d2265c145fd535e4ca5e823e62 SHA-1: a78c6c21b42bcbefda32f5619c9a106c0210020c SHA-256: 1a1d92d4fa7c16e525c40b46978a608d8c51b873cc73ac543902869dfb23ab06
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=fitter%20theory%20questions%20and%20answers%20in%20english%20pdf'. This URL is likely part of a phishing or scam campaign designed to trick users into downloading further malware or visiting malicious sites. The document body, though heavily obfuscated, contains text related to 'fitter theory questions and answers' and the redirector URL, suggesting a lure. The presence of a link farm heuristic further indicates 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.cc/wb?keyword=fitter%20theory%20questions%20and%20answers%20in%20english%20pdf In PDF document text
    • http://files.westmorelandchildrenfirst.org/uploads/1/3/2/3/132303068/1512247.pdfIn PDF document text
    • http://files.mrobrien.net/uploads/1/3/1/4/131482916/vakok.pdfIn PDF document text
    • http://files.jenisonchoirs.org/uploads/1/3/0/9/130969182/xitijigusev.pdfIn PDF document text
    • http://files.rabaul-dive-adventures.com/uploads/1/3/0/7/130776041/3350309.pdfIn PDF document text
    • http://files.rachaeljanedesigns.com/uploads/1/3/2/6/132680781/6132568.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/1/0433/2643/9582/files/8965156765.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1542/files/lowes_carbondale_il.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6225/9865/files/20621890237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/barbell_medicine_training_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2192/4514/files/adjectives_and_its_types_with_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/23631983595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7070/8125/files/anti_money_laundering_amendment_act_2020_act_874_ghana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/car_amp_repair.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8766/7103/files/42357489078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/classic_dungeons_and_dragons.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_off0000821c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x821C 5580 bytes
SHA-256: 672019b219a0c0f24cb6945c9a98252529ed1de27ba312cabfb337133a10f15e
font_01_sfnt_off00009527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9527 15808 bytes
SHA-256: a20560066aa8cb88c6415e727036b856eadd5eabc5a6c9d2a548b21b82bcb4ab

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