Malicious PDF — malware analysis report

Static analysis result for SHA-256 655a4cb1de99f60f…

MALICIOUS

PDF

55.9 KB Created: 2020-08-05 14:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c084e27ee97f679d3220df80a31408fc SHA-1: eccce6be34ddc4af91471fda64bfc2db186376ed SHA-256: 655a4cb1de99f60f1d03435842a6b7460be8a262c527e31df2dbc4d5d8399517
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) that is flagged as malicious. This suggests a phishing or scam attempt, likely using a link farm to distribute malicious content. The presence of many links, including one to a 'dwg_viewer_convert_online.pdf', indicates an attempt to trick users into downloading potentially harmful files.

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/pify?keyword=bayesian+statistics+in+r+pdf In PDF document text
    • http://files.oregondyslexiainstitute.com/uploads/1/3/1/3/131380397/muwezivamogi-wewodanasopok-lagolisusavemug.pdfIn PDF document text
    • http://files.naturegreenleafllc.com/uploads/1/3/0/8/130874085/zegoxog.pdfIn PDF document text
    • http://latav.yarramlandcare.org/uploads/1/3/0/7/130739664/28b71d1.pdfIn PDF document text
    • http://files.welcometothegreenroom.com/uploads/1/3/0/8/130874361/553377.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/1/0433/0097/8853/files/dwg_viewer_convert_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/wulatojozavasigaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6690/files/78681372189.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/10329896364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6638/2746/files/92548122752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/61954977229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/pugazaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/xezojup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6559/6321/files/81995714276.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8788/6488/files/27128402714.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.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 6

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_off00009e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E40 5268 bytes
SHA-256: 48a488017b41b2d4f4b835dbc5c5f90eec07980536479863098801651714f039
font_01_sfnt_off0000b043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB043 9980 bytes
SHA-256: d331b4cb0ccdf89a7b8f2f18b4160c544139538ea77ea6287e2851959d8bb4eb

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