Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad7d664b4676300…

MALICIOUS

PDF

43.1 KB Created: 2020-08-23 01:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5b52dc2f467a20f722fa0ba475137db3 SHA-1: 0bac6417c187db59b4856c636fc4b8960dab1b94 SHA-256: cad7d664b467630035b8b0e767fbf78d7b8e95c09e08d88d6e7f6363e6ce7aa6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on ttraff.ru. This infrastructure is known to redirect users to malicious sites. The document body, though heavily obfuscated, contains references to the URL and appears to be a lure for users searching for specific documents. The primary malicious activity observed is the redirection to potentially harmful content via a link farm.

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=net+sociology+syllabus+2019+pdf In PDF document text
    • http://watajotig.ambroidery.com/uploads/1/3/0/8/130814088/9bbcd1d63a86e.pdfIn PDF document text
    • http://lotavejov.alphaomegamartialarts.org/uploads/1/3/0/7/130776485/5991756.pdfIn PDF document text
    • http://sagufamu.jakobsvensson.com/uploads/1/3/1/3/131379874/7785839.pdfIn PDF document text
    • http://jonute.crosley.com/uploads/1/3/1/1/131164250/gofarubi.pdfIn PDF document text
    • http://files.adametranslationservices.com/uploads/1/3/1/4/131453679/b0e92dd3932dc.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/1/0435/3140/3413/files/baguio_country_club_membership_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3885/0728/files/bizobinivaribod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/49333406292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/jexixewekuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/gafivolozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/51103536273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/37835050314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1003/4597/files/fojazapisariwikukedat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/american_and_british_english_words_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/8499270051.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_off0000687a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687A 5920 bytes
SHA-256: 8b30225c1d97b4605465267609fff588ea11f1e98c1b7e2be484e2fa4e038158
font_01_sfnt_off00007cbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBC 10084 bytes
SHA-256: 1e29dcb2ff1dbfd9dda422ec50b77a2b4b5ab542303b45f0ea1d4f4c266dc14e

Open this report in the interactive analyzer, or submit your own file for analysis.