Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab99055ba5cc41fb…

MALICIOUS

PDF

44.8 KB Created: 2020-08-14 16:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 62d2cb9048d6611084d8b06bf5b9b651 SHA-1: b8df37a9c2f3d7519d4766f59bdffc529221761f SHA-256: ab99055ba5cc41fbc7017ea40e4e9b85eeee13bcaf4cf238fb790f62783f18e1
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=adobe+air+android+free'. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The document also contains a large number of embedded links, many hosted on Shopify, which is flagged as a link farm. The primary intent appears to be to drive traffic to the malicious redirector.

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=adobe+air+android+free In PDF document text
    • http://files.y4f.co.uk/uploads/1/3/1/4/131437123/lenip_vijunobarezate_kuwamuzexigisup_nenujutupovix.pdfIn PDF document text
    • http://files.pacehighchoir.com/uploads/1/3/1/8/131871891/2056809.pdfIn PDF document text
    • http://files.inspirepacohio.com/uploads/1/3/1/3/131383330/nepunugozaribebe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/3d_maker_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6552/3862/files/83560934633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8948/4194/files/hp_printer_install_wizard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/tudiwofemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/wizofilum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/37672192321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5181/0969/files/zilirolaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4746/0768/files/tigivorodijijan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1927/9258/files/english_grammar_practice_exercises_with_answers.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 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_off00006780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6780 4528 bytes
SHA-256: d230630283b64d43dec297c7ecda5771151b90eee91b12e7c7023763338db13d
font_01_sfnt_off000076da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76DA 9976 bytes
SHA-256: b377d835fc92fdd3daab78fd35f2e09abb349970bce56390e7ed872625e77d07
font_02_sfnt_off000098fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98FD 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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