Malicious PDF — malware analysis report

Static analysis result for SHA-256 817b39c83baf5745…

MALICIOUS

PDF

37.2 KB Created: 2020-08-08 08:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25900eb75382acc954749f888a8af70d SHA-1: e85878381db86aa2ecdb17e889c5b2b37e3ebfd5 SHA-256: 817b39c83baf57454825d44fbf36f283818b7393c3311a7d6dbccdee00ce25b0
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to appear as free downloads, but they redirect to malicious infrastructure. Specifically, the link https://ttraff.ru/pify?keyword=lala+ramswaroop+ramnarayan+calendar+2020+pdf+free+download is identified as a malicious redirector. The document body and heuristics indicate a link farm strategy, likely for SEO manipulation to lure victims.

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=lala+ramswaroop+ramnarayan+calendar+2020+pdf+free+download In PDF document text
    • http://files.hchstheatre.com/uploads/1/3/1/0/131070733/tavajenuzedu-pozerulaw-ginogixadeve.pdfIn PDF document text
    • http://xarinefaj.westernfamilyfarm.com/uploads/1/3/1/4/131453494/xezenazevob-wipofivajiliv-filujozubutaz.pdfIn PDF document text
    • http://files.uclachatpd.org/uploads/1/3/1/8/131857626/xibaperixo-rurokajezoxis-ronuj-watogerolov.pdfIn PDF document text
    • http://files.royalenfieldmotorcycles.net/uploads/1/3/1/6/131636651/bevatewuviwore-zufegemo-zexipavef-sanixuz.pdfIn PDF document text
    • http://files.sctecentralfl.org/uploads/1/3/0/8/130874023/latememekeze_kimixipopo_xufuxiguwuziji_gafelis.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/1/0431/2186/8960/files/zuzududunosukovunuvebuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/97666732110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9495/7475/files/germes_anarobies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9961/1555/files/32270538187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/19308010861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7868/8674/files/lopogulolerisokojesorip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/74545078483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6742/4412/files/jisasamovovozemunilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6377/1293/files/physics_important_formulas_for_neet_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6939/1527/files/dynamics_of_machinery_class_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1475/6251/files/graphics_design_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2969/2577/files/donam.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5230 5708 bytes
SHA-256: aaaabec9bcbe3bea611da1a1646285503ad7438f8b696f220930795a90cf03f5
font_01_sfnt_off000065a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A5 9876 bytes
SHA-256: 3ab6714343d7601b0d3cf7cf744168bacc6a8b585b7696cea399546a042d771d