Malicious PDF — malware analysis report

Static analysis result for SHA-256 131c1d4bb71f4291…

MALICIOUS

PDF

39.3 KB Created: 2020-08-17 11:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21071676fc66a9e9b38c9e2bf6e99894 SHA-1: 49eb641414c8c3d2d047087e09b9dcedce38d569 SHA-256: 131c1d4bb71f429160f6d89fd0301786305dc22f7e2c26e1d9f40eed062966f0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, many pointing to Shopify-hosted PDFs, forming a link farm. A critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious destination. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, but the presence of embedded URLs and the link farm 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.com/pify?keyword=aws+api+gateway+custom+domain+cloudformation In PDF document text
    • http://muxalu.act-sat-tutors.com/uploads/1/3/0/9/130969679/2e92670419cb271.pdfIn PDF document text
    • http://tasereda.skylinevisioning.com/uploads/1/3/1/3/131380058/8424742.pdfIn PDF document text
    • http://files.goodtimesatlanta.com/uploads/1/3/2/6/132695662/1912e73c17ee4de.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/1/0448/1181/3015/files/77211343704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9744/6818/files/30496548389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/business_plan_product.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/1_99_herblore_guide_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8326/8257/files/sumozudanowam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0990/8642/files/10222140757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1094/9273/files/beechcraft_king_air_350_poh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1817/4107/files/xipekerobugoruvovare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/rerofijugaduvumon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4296/6426/files/navevenuxiguneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6775/3116/files/31113512374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/geranakurunogabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/speaking_activities_for_esl_adults.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 3

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_off00005a5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5B 5660 bytes
SHA-256: 6f0b04f857dadc4b6c6c7035e7877ddb2c87f24accc60277359de5aa8feaa505
font_01_sfnt_off00006d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D96 9980 bytes
SHA-256: 2033635a5a58f14b755180c11fed9d5787f9a2682c0c6149349dc45665682275

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