Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b8b6e9ea040900…

MALICIOUS

PDF

43.9 KB Created: 2020-08-18 20:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ebae18bd996581125b72d5fa033e6c2 SHA-1: 7dd9bf2bc87efa31df4781b8893f4290fd5cc7fa SHA-256: 85b8b6e9ea04090064b2eed6c936c2bc0ba1466325ad9919cfac807a20da7a30
194 Risk Score

Malware Insights

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

The PDF contains embedded links and a document body that attempts to trick the user into downloading a file by presenting a lure related to an 'audio booster'. The primary link redirects to a known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The presence of numerous external PDF links further suggests a link farm used for SEO poisoning to increase visibility of malicious content.

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=audio+booster+for+windows+7 In PDF document text
    • http://sufugefod.actionpestnm.com/uploads/1/3/1/3/131384284/fegibexetemore-gidoru.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/1/0428/9350/8771/files/75359983790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1321/8210/files/23906717701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/homebase_plastic_dust_sheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2474/3591/files/how_to_use_airshou.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4526/5318/files/convertir_chiffre_en_lettre._xla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0248/6180/files/berokivomer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8961/5266/files/vutunifuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2564/5211/files/ronasegezasajizijurupisar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8551/9255/files/biology_class_10_icse_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/bibijog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9323/7665/files/11402211078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/linutato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4089/7174/files/simufotoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0246/1351/files/introductory_chemistry_7th_edition.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 1

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_off00006fb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB2 4960 bytes
SHA-256: 5e67400d566a67d869930d56e5c093250b3353d3008e141b18239e4ea0fcc7bd
font_01_sfnt_off000080b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B8 10004 bytes
SHA-256: 3a347ea94e996b7ad237532538a406492d16dff68b44d4dcca539c77f79fd5d6

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