Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b72410331b60c57…

MALICIOUS

PDF

69.1 KB Created: 2020-08-13 22:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 014a2a68e3ccb64c3fa2eaf18f84e459 SHA-1: 4447b10677eadfe1ba9f3ff784b6f4c152569558 SHA-256: 0b72410331b60c57e264918616c984431893de3ef35705db1370f8b87a7eee01
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt to lure users to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links suggests an attempt to generate traffic or lead users to potentially harmful content. The document body itself is heavily obfuscated and contains the primary redirector URL.

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/wb?keyword=biosynthetic%20pathway%20of%20tropane%20alkaloids%20pdf In PDF document text
    • http://files.thepalletguys.com/uploads/1/3/1/3/131383977/buwafudo_jopulukixu_monavol_sojizos.pdfIn PDF document text
    • http://files.jayandersonbass.com/uploads/1/3/0/7/130776003/zovavumifabo_nokepowelor.pdfIn PDF document text
    • http://sadafokof.ward72joburg.net/uploads/1/3/1/6/131637136/dawutulalefunagozo.pdfIn PDF document text
    • http://sotunow.sobabaseball.net/uploads/1/3/1/0/131070450/723032.pdfIn PDF document text
    • http://files.scvmc1g.org/uploads/1/3/0/7/130776125/c884b.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/1/0428/4396/3559/files/speak_up_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1642/files/81277622636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2871/6439/files/17878948120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/pewosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/nobira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/pisanozabinaxokola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/rijoxoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6758/4162/files/ball_bearing_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2597/9813/files/munewijowasodazevebiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8237/5577/files/11905118730.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1407/9143/files/28482921818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/livre_apocryphe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7234/7550/files/vukivizev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8447/8632/files/mr._beer_brewing_instructions.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC953 5552 bytes
SHA-256: ad7e77f093e15440cee645fb37946225afaa665bdaf74ca28ee7fe6a2fe20837
font_01_sfnt_off0000dc3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3A 13328 bytes
SHA-256: 1b5630b5ecfcb34126e82ad3646ec0488e4f072de393c18ea4a8be8351598051