Malicious PDF — malware analysis report

Static analysis result for SHA-256 f165938e4c4b393c…

MALICIOUS

PDF

42.1 KB Created: 2020-08-16 00:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31326eac21e638d94b7ea562582f7a24 SHA-1: 8b2d4d7a788de5728b8ede639f41fda929420dce SHA-256: f165938e4c4b393c5cbde193fa325bcdbbd54ca35abec59addc7ef0025fee747
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at https://ttraff.com/pify?keyword=potato+salt+water+osmosis+lab+report+conclusion. The document body, though heavily obfuscated, appears to contain academic-sounding text to disguise the malicious intent. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports the malicious nature of this document.

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=potato+salt+water+osmosis+lab+report+conclusion In PDF document text
    • http://gokuwigop.education-deans.org/uploads/1/3/0/7/130739704/sonatupam.pdfIn PDF document text
    • http://files.jessmag.com/uploads/1/3/1/8/131872104/34e9b.pdfIn PDF document text
    • http://fakiwibor.ewengur.com/uploads/1/3/1/3/131383483/xigip-mapasenepuwawuk-zawokuj.pdfIn PDF document text
    • http://files.wildgingerdaycare.com/uploads/1/3/0/7/130775850/nidoxijebepolewazew.pdfIn PDF document text
    • http://files.kawsaycenterperu.org/uploads/1/3/0/8/130814980/xifudifenowi.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/1/0431/6643/3435/files/34042564930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/barusur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/8272/9896/files/36753046385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/85797576811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/namatatozapuxegaxino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8442/2051/files/breathing_underwater_rohr.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6748/7894/files/california_pizza_kitchen_menu_prices.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_off0000663e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663E 5312 bytes
SHA-256: f5a2a3714dca3731a22c3d13ca72a5f5cde4ea00611d788d211ed42aa472a356
font_01_sfnt_off0000783c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783C 10448 bytes
SHA-256: dc0ddaa6788e3f9f47819a7a9333c0aa73bcf79a7b9d4b197b909bb48dcb7791

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