Malicious PDF — malware analysis report

Static analysis result for SHA-256 278b14de815e54ff…

MALICIOUS

PDF

44.6 KB Created: 2020-08-20 02:32:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3c243686112ce4c1c13088ef089d87f SHA-1: 290fdcd627d883e74829bd65f4061a82f9e04ed7 SHA-256: 278b14de815e54ffbc315aba39e215c12912736530d8fe2f9b5f9b3f3e477b32
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'ttraff.ru', suggesting a phishing or malware distribution attempt. Another heuristic identifies a PDF link farm, with numerous links hosted on 'cdn.shopify.com', further supporting the attack pattern of directing users to potentially harmful content. 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.ru/pify?keyword=former+quarterbacks+for+pittsburgh+steelers In PDF document text
    • http://files.ljkplumbingandheating.co.uk/uploads/1/3/1/4/131406717/wuvalelezo_gobubuzodobeteb_sojozajasa_sejimumameg.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/1/0432/5759/4016/files/66589843539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3982/4799/files/momufowizoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4902/5690/files/rijuwukasitivodirejop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/tudarutoraked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/axcrypt_1._7_3180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5391/6053/files/vokotama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/0292/9831/files/breathe_angels_and_airwaves_piano_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7453/3014/files/83947884959.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
🗂 Part of campaign: ljkplumbingandheating.co.uk 4 samples

Related samples 4

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_off0000624f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 5712 bytes
SHA-256: 572f17e337a65172f3c39144c0084f14f7742a8571f63a5574edd258d69271e5
font_01_sfnt_off0000759d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x759D 15456 bytes
SHA-256: b84d7dc9589b548e4e0409eb37ac077003df04d3cdd02a8e8b9ccdd93d9f027c

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