Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffc82bc0c993668c…

MALICIOUS

PDF

54.9 KB Created: 2020-08-14 18:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7fb67c61515628c3391dfc88c553df76 SHA-1: 15ee819aa72e5c51768815b14f15e54d0c9aef96 SHA-256: ffc82bc0c993668c420e92281ceabdec3024212a5f6e966a3776121677fa6c4d
194 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a high density of embedded links, with a critical heuristic identifying a redirector link to 'ttraff.com'. This suggests a phishing or malware distribution attempt. The file also contains a large number of external PDF links, many hosted on 'cdn.shopify.com', which is flagged as a link farm. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=hey+brother+english+song In PDF document text
    • http://files.doyleqhs.com/uploads/1/3/1/3/131380445/b7410156f86c7.pdfIn PDF document text
    • http://files.filmscorefans.com/uploads/1/3/0/8/130814581/rilixiroguj.pdfIn PDF document text
    • http://files.commentingtogether.com/uploads/1/3/1/8/131871778/duzijonuv.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/1/0430/8022/0826/files/3373740922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/zisefaminenupilokem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/49217243095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6971/6118/files/xuguzuvososobivozegada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/38902839024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/7789870489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5453/8658/files/tunejufegupubaxerizuba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/38218608124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/29098113715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/dudine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5592/2856/files/cambridge_pet_reading_part_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9250/6779/files/cable_stayed_bridge_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/social_psychology_4th_edition_gilovich.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_off00008fac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAC 4940 bytes
SHA-256: a72fdf77848a5168187baf00be21f79917bcf6daafa1840b289e67b2eccaae8b
font_01_sfnt_off0000a07b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA07B 15112 bytes
SHA-256: c6af82ead3edfadb66bfbaba1d21df57a56e90f0691f21c9c53343571dce15be

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