Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d1a35a330bc968…

MALICIOUS

PDF

44.7 KB Created: 2020-08-02 13:39:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8443898391921bbe6da9570abbbbb9b3 SHA-1: 5ff194f6a8ee309234c9784ab963f9f2ef95081f SHA-256: 55d1a35a330bc9682f1e022e29ef98189d844e61d2c1462d10f2e275ae3bab8d
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.ru/pify?keyword=apple+ringtone+remix'. Additionally, it exhibits characteristics of a password-protected archive lure, suggesting the PDF itself is a decoy to facilitate the download of a password-protected payload. The document body, though heavily obfuscated, contains the malicious URL and numerous other PDF links, likely part of a link farm to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=apple+ringtone+remix In PDF document text
    • http://files.kickstart-hr.com/uploads/1/3/1/1/131163949/detopanibiki.pdfIn PDF document text
    • http://files.wow.yez.dk/uploads/1/3/0/9/130969300/950705.pdfIn PDF document text
    • http://nofuvufo.shopcatchboutique.com/uploads/1/3/1/4/131438539/ramogipuvurube.pdfIn PDF document text
    • http://files.learn-bhangra.com/uploads/1/3/0/7/130775554/7398052.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/1/0430/8402/1921/files/puvukinepelorezozelal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2971/7407/files/wudupuwobinenabafav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3432/8738/files/wojararumemelit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2146/5757/files/21402837896.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/installing_kong_locally_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1619/9064/files/21207503461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4183/2615/files/59894928857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9001/7430/files/puwekiralisobadifutokinek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/55155839814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2296/7207/files/45646114788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4617/4877/files/97349650314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/how_to_reverse_linked_list.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6676 4596 bytes
SHA-256: dd30aab97d2e24bc9985e954c563b6c4157b9301a7ee8bfab5f2acda56a5f0c8
font_01_sfnt_off000075f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F4 9900 bytes
SHA-256: 1401a5e866b96b822d418459a0881096e5abf05805dbbd447ef457b93cf17b34
font_02_sfnt_off000097c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97C6 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361