Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f93a2d13fabb50…

MALICIOUS

PDF

41.4 KB Created: 2020-08-13 22:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c053b5c07f98796f9c2f05d7efb2b447 SHA-1: e1bb41ef9b4622ebb403a55b70a7b3184a5a4bf3 SHA-256: 86f93a2d13fabb504d7bf8a987c11b3482ff9ca2d6dfc8133ad1ff9475d38a60
234 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 external PDF files. One of these links, https://ttraff.cc/pify?keyword=zen+alarm+clock+sound, is identified as a known malicious redirector. The document's structure and the presence of multiple external links suggest an attempt to lead the user to malicious content, likely for phishing or malware distribution. No scripts were extracted, but the PDF's nature and link analysis strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/pify?keyword=zen+alarm+clock+sound In PDF document text
    • http://files.rfid-off.com/uploads/1/3/0/8/130813866/9247936.pdfIn PDF document text
    • http://temoxegu.bkhouse.services/uploads/1/3/0/9/130969204/pidizawika_rokejut_pofoxa_rigixu.pdfIn PDF document text
    • http://diber.okiobi.com/uploads/1/3/1/1/131164278/1321128.pdfIn PDF document text
    • http://zebobi.chasingourmemoriesgeneralstore.com/uploads/1/3/1/3/131380600/4121720.pdfIn PDF document text
    • http://files.cinsationaljenn.com/uploads/1/3/0/8/130874317/mimil_nomoxeg.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/1/0436/9121/2950/files/77651545915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/dell_deminsion_2350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6423/6968/files/cannon_power_shot_s2is.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6878/3768/files/sidofegipuzavazimurude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/24633679908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2847/2220/files/88623727813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2804/5209/files/zuwogakudotozelakezek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/36722625137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9502/4033/files/bofatuwulubitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5660/4070/files/advertising_promotion_and_new_media.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3423/8362/files/1915871414.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_off00006518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6518 5108 bytes
SHA-256: 76a1e316ccf7cd3720cd3bf7d264cbd71c25fd761ac37d76ab04139a80d922d4
font_01_sfnt_off00007658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7658 10156 bytes
SHA-256: d76fb6e5598963e52ead885f87091428482b53f92428e9ba614b60dbf51d6023