Malicious PDF — malware analysis report

Static analysis result for SHA-256 28713a14ed8aa152…

MALICIOUS

PDF

108.1 KB Created: 2020-08-06 18:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9aa8e5d1c4ecc5362b4669902a86400f SHA-1: 937fce54269686f9ff7c43a2c053f29a64f4f43a SHA-256: 28713a14ed8aa152726af1fb0d9998095cbbe4d7cde2938c99f7716d797a3a34
194 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=role+of+arab+league+pdf'. The document body, though heavily obfuscated, contains text suggesting a lure related to the 'Arab League'. The presence of numerous external PDF links, many hosted on Shopify, indicates a potential link farm or content-spinning operation designed to attract search engine traffic and distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=role+of+arab+league+pdf In PDF document text
    • http://files.rooftopyogalisboa.com/uploads/1/3/1/4/131438111/pomume_fogorasarirawog_zitixufixi_rudofudibike.pdfIn PDF document text
    • http://files.translink.net/uploads/1/3/0/7/130740044/975dc.pdfIn PDF document text
    • http://files.oberonmassage.com/uploads/1/3/0/9/130969572/b71ba.pdfIn PDF document text
    • http://files.haileegibbons.com/uploads/1/3/1/4/131483386/1acbb3e6c1d329.pdfIn PDF document text
    • http://mimiz.holdingworx.co.za/uploads/1/3/0/7/130776485/5664134.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/1/0438/0524/5597/files/nisamuwazekokatisinebit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1896/9507/files/6663889362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4180/0860/files/puzatagetifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/35470138166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1128/2840/files/1552094278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7763/2154/files/52830200804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9784/1054/files/54044375298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8397/2256/files/7328089427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/gmail_search_operators.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_off000155fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155FC 5180 bytes
SHA-256: 9a1eeddc64a85e83410ee27125bfdd2c39d32739d603f95b6f8ca0783d9f76e2
font_01_sfnt_off000167ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167AB 11252 bytes
SHA-256: 893d219d5fb236d1cf6d7937ca93346625614d39316334c2bd7bda8bc1a65e28
font_02_sfnt_off00018d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D63 16204 bytes
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501

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