Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4bf84d906f89ac…

MALICIOUS

PDF

46.1 KB Created: 2020-08-20 20:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab32dcd333e63a916d5b39406264b9b3 SHA-1: bdedfd7377a8236dc213b62fca370e7f3f6aa6bf SHA-256: 6d4bf84d906f89ac9c2dd5e20b3e27910ecbf54283fbb37e4bee6db26d38dbef
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. These links are presented as part of a 'link farm' designed to appear as legitimate content, such as audit checklists or manuals, to entice users to click. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or malware distribution attempt.

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.ru/pify?keyword=iso+internal+audit+checklist+template In PDF document text
    • http://xunixivi.ozgurince.co/uploads/1/3/1/8/131856543/tuguzutanoxok-jafis-lutirikatenuvon.pdfIn PDF document text
    • http://penanan.ardentacres.com/uploads/1/3/1/0/131070036/2289482.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/1/0435/8891/1267/files/biology_lab_manual_class_12.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6657/files/24427997055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/saxebujixipofamedupow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6280/2085/files/nuwuga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/gawudagadawomigikivufosat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6670/3516/files/26603872615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/booster_internet_wifi_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5448/7957/files/24410457837.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9947/2550/files/vurelomezelogexeveto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3375/4773/files/minecraft_how_to_teleport_to_bed.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 7

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_off00007712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7712 5316 bytes
SHA-256: f35b5ca31af6810a307db78e28c2f108eaa67da4b20d4c1e901c3df6aeb5923b
font_01_sfnt_off000088ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EF 10252 bytes
SHA-256: 9ec34b22a863564440d0a78c5c3c8c42c1f43f21544a4257f78a4efc2a744687

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