Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b553ed588324957…

MALICIOUS

PDF

42.6 KB Created: 2020-08-16 12:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b985bac9ee9290e75721f173a0f25590 SHA-1: 9ac0511f0272242ca474d827d686cd69336c4dd0 SHA-256: 5b553ed5883249576e688cbdfc47640eef46b2bb051b4b075f65cda7c0262ff0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, contains a URL that appears to be the primary lure. This suggests a phishing or scam attempt designed to redirect users to potentially harmful content, likely for further exploitation or malware delivery.

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/wb?keyword=adaptation%20worksheet%20grade%204 In PDF document text
    • http://files.alexlitsoudis.net/uploads/1/3/1/4/131453919/benoxovazekiv.pdfIn PDF document text
    • http://files.retailfanhubnw.com/uploads/1/3/1/8/131856539/c1d59d1f.pdfIn PDF document text
    • http://files.jessejonesioofpark.com/uploads/1/3/2/8/132814071/5215711.pdfIn PDF document text
    • http://files.muckabout.ca/uploads/1/3/1/4/131407102/vokemoxumab.pdfIn PDF document text
    • http://files.sand.penguinprof.com/uploads/1/3/0/7/130738991/3b43d0d7.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/1/0430/2041/9226/files/setolewozaxabavuguminizew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5448/1054/files/33487502943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/95430174064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6995/4453/files/wosetametelijapimoxejupur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7195/5351/files/badexiperofikabob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/kogobelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sivezijikok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4517/9807/files/logical_reasoning_aptitude_comprehension_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1567/5815/files/nopiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/certificado_antecedentes_contraloria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4034/2169/files/fluke_fishing_reports_ny.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_off000067be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67BE 5424 bytes
SHA-256: a5e303d91b2a0ddd64bc2b98cd2246e3a2eb4cadbc38f98b38dc695f1926be39
font_01_sfnt_off00007a42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A42 10364 bytes
SHA-256: d8e152bfe6aab4364afb4a30290856c0480adcb108b56b756cb997ebb2d4d139

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