Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c7d6fa8018177a…

MALICIOUS

PDF

37.8 KB Created: 2020-07-30 13:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4115789a571a2eeb96db863aaf604118 SHA-1: 9ea93df52d61dfde5d1fd677c4c6fb8b6531f97d SHA-256: f5c7d6fa8018177acf8858bef25be485ad6cdc009c152aae6d89acc99a9398e2
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. This URL is presented to the user as a link to an academic writing PDF. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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.com/pify?keyword=introduction+to+academic+writing+pdf+longman In PDF document text
    • http://files.joelwinfinefoods.com/uploads/1/3/0/9/130969960/2112517.pdfIn PDF document text
    • http://files.dukechoir.org/uploads/1/3/1/3/131379037/kinubotuzavare-serure.pdfIn PDF document text
    • http://files.kathleenmoranart.com/uploads/1/3/1/0/131070374/kufelewekusapajelop.pdfIn PDF document text
    • http://files.cafe643.com.au/uploads/1/3/1/4/131406506/4774588.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/1/0435/4405/1864/files/gefejamovud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6879/1713/files/40269994879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9025/4749/files/zivaselazumesek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/21353668948.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1003/0759/files/lebofokuwonoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/2649319773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7261/8657/files/nujetisisenigadegasoroti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/roxidimazawisinabifixebe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0525/5586/files/jebizavikufukijojoxedig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6057/5894/files/bivobawuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8145/0147/files/kuwemozizoniruf.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_off0000582d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x582D 5208 bytes
SHA-256: a52fd1214d54937d58885d2a06adc2b447c5062052accea727b0c950e843da00
font_01_sfnt_off000069db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69DB 9428 bytes
SHA-256: b5e64b4c4c91303b3d132cc1bc188beca4bc9f762d2746cfadb538c97ebef478

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