Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca4cdb70f20ac48b…

MALICIOUS

PDF

42.5 KB Created: 2020-09-10 02:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81f9888ef9decaa5c0e573c7dd5a1202 SHA-1: 0d6f9289b48edfb6cf6794507d5e37a75d7b55ef SHA-256: ca4cdb70f20ac48b6ad1a66a40fe565e12adfbe38df4a6069a1a4067f1884c8b
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=can+a+pdf+be+harmful'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, including one to 'https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5555796470.pdf'. The document body, though partially corrupted, includes the title 'Can a pdf be harmful', reinforcing the deceptive nature of the 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.me/wix?keyword=can+a+pdf+be+harmful In PDF document text
    • http://files.susannaabeldesign.com/uploads/1/3/1/4/131408027/393b70.pdfIn PDF document text
    • http://files.visionstepteam.org/uploads/1/3/0/8/130873728/3949604.pdfIn PDF document text
    • http://files.mexpup.com/uploads/1/3/0/8/130815381/wugenafapon-denutepibijan.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/1/0433/0687/7080/files/5555796470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5041/8847/files/refikasatuvidugarupudobof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9074/7293/files/xakivipegorisadoxizuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0472/3091/0629/files/15484097724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/nesatifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6728/4379/files/doguxotulopafifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0103/6443/files/life_code_dr_phil_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/80486740522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7932/6110/files/veduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/sigaxabediz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/81678370293.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 5

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_off00006918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6918 5148 bytes
SHA-256: c9b8172b90c6a7515545f8a72bf1d206bbe83d47a995dd0cd37246a626ffcad6
font_01_sfnt_off00007a62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A62 9860 bytes
SHA-256: ff016738a295542b323c3b34862c4b366e8460671ca5dc897c42e2361373732d

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