Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c74610771a780c4…

MALICIOUS

PDF

56.8 KB Created: 2020-08-19 00:56:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e6651ba20089bf91aaa9a56b2f1b0ee0 SHA-1: 74679062f7ee9fee8be3f134c55ed54be7b599c9 SHA-256: 1c74610771a780c4a6cb130668ccc46d9c15c971a2dbd175b18715f536c73fad
194 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic firing indicates a malicious redirector link, specifically `https://ttraff.ru/pify?keyword=guide+to+antimicrobial+therapy+2017`, which is likely used to direct users to malicious content. The document body, though heavily obfuscated, contains text related to 'guide to antimicrobial therapy 2017', suggesting a lure to entice users to click the malicious links.

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=guide+to+antimicrobial+therapy+2017 In PDF document text
    • http://files.northwoodsquiltguild.net/uploads/1/3/0/7/130776246/9d87468.pdfIn PDF document text
    • http://files.ohca-reprobank.org/uploads/1/3/1/4/131437924/rukedetifaxovowakus.pdfIn PDF document text
    • http://files.stdaighs.com/uploads/1/3/0/7/130739112/patokefiruzikadazisa.pdfIn PDF document text
    • http://tavikora.siblingsandcompany.com/uploads/1/3/1/3/131383727/kurojesirazur_lotaga_wuxapogex_zelavosila.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/1/0431/5247/4267/files/71982884026.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3303/3880/files/tesis_de_brosimum_alicastrum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/vifipovodevebabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6284/5859/files/53610007039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/japejovomuvulumebudegiro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2089/1798/files/fugutamadebijakexevon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/kaniboxifizi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3925/0853/files/garmin_nuvi_2595lmt.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 7

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_off00008ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA3 5696 bytes
SHA-256: ce9ca2a4cdfacc1eedb895869be04761c2bbebe9a031c7a04c5b0c224159855f
font_01_sfnt_off0000a1e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E0 11800 bytes
SHA-256: 9d68f04feb1240bff3dab91682a4d30ae0f3a0481facf813057da9cd802b4df0
font_02_sfnt_off0000c833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC833 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

Open this report in the interactive analyzer, or submit your own file for analysis.