Malicious PDF — malware analysis report

Static analysis result for SHA-256 74433d428f8ec339…

MALICIOUS

PDF

52.6 KB Created: 2020-08-14 03:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b5ff5913199696c209fb4250b4b60d87 SHA-1: 8355f095e1ff4414d8571da83bc39b632725372b SHA-256: 74433d428f8ec339111914e3a9dc87d559fad0a2994785da0e7d0189dc10b51b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, including a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, appears to contain text related to 'Vehicle blackbox dvr installation guide', suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of 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.ru/pify?keyword=vehicle+blackbox+dvr+installation+guide In PDF document text
    • http://files.bigskyhandmade.com/uploads/1/3/2/6/132682851/xoxunati-lugakekazilab-romawota-jidazem.pdfIn PDF document text
    • http://bisazopi.gilmsp.com/uploads/1/3/0/8/130874422/190e34f1b8fe.pdfIn PDF document text
    • http://files.intsangano.com/uploads/1/3/1/4/131483685/fojig.pdfIn PDF document text
    • http://files.trilogywineclub.com/uploads/1/3/1/0/131071056/236c3.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/1/0430/0016/8597/files/wojabofudolulosado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/77002487127.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5969/2191/files/grade_12_chemistry_past_papers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1822/1730/files/south_african_food_based_dietary_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4680/5404/files/jorawupipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4989/3531/files/kubev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8402/1921/files/face_shop_green_tea_sheet_mask_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/11042518736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/10305657888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/47611869579.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000706b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706B 5500 bytes
SHA-256: df1688e1f931d85d8092ca99bab53ab662d51260a49cfb33043fe8ed77064a0b
font_01_sfnt_off0000831b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 15956 bytes
SHA-256: 41359dfb2b39f452014d648ddcb2bc83daa11de86e2046ad4c94c970c71538c2
font_02_sfnt_off0000ade0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADE0 16392 bytes
SHA-256: c9b9d40238817e9fd1c0b290bb100284b8f2d9dcc1188338581b9d27efa8fa30

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