Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b113790c45b77c0…

MALICIOUS

PDF

38.6 KB Created: 2020-08-13 22:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a0b35811332a6a3b64e4759cc572c279 SHA-1: 2885cce198c347b683616fddb4661c09605f0f11 SHA-256: 7b113790c45b77c0a45f9e81a67a09f37f65efb500335384ebf2a480f2e8f692
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though obfuscated, contains a URL that matches the redirector found in the heuristics. The presence of a link farm and a malicious redirector suggests an attempt to lead users to potentially harmful content or phishing sites.

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/wb?keyword=sno%20tek%2028%20engine%20manual In PDF document text
    • http://files.oraclestheatre.com/uploads/1/3/1/4/131437626/sagugakukajip.pdfIn PDF document text
    • http://files.eq-apparel.co.uk/uploads/1/3/1/6/131637357/7891023.pdfIn PDF document text
    • http://bidadiwo.haskettconsults.com/uploads/1/3/0/7/130739704/1351964.pdfIn PDF document text
    • http://vaxobokiz.stuartkettleartist.com/uploads/1/3/0/7/130775934/74fd80320386cb3.pdfIn PDF document text
    • http://files.cassowaryday.org/uploads/1/3/2/8/132814276/7484443.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/1/0430/0688/6051/files/jailbreak_ios_8._4_no_computer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/angle_of_elevation_and_depression_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4031/5294/files/fesekedepironunitaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/rezozupuxutuxupumidoxenij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0096/9896/files/gixavaxutezasumalipitot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8775/7461/files/73972736858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/76246601424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/bankruptcy_and_insolvency_act_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1153/8072/files/96_seadoo_xp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/accelerator_pedal_position_sensor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3476/2654/files/veer_bala_rastogi_genetics_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3062/5950/files/46989678410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2218/8701/files/30472804843.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 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58CC 5224 bytes
SHA-256: 74c470a42418d9fe42fe8e1a7d6726d3b1128126aa4a844c103744ac35e36bf3
font_01_sfnt_off00006a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A83 10388 bytes
SHA-256: 353bde08aea38ed397d6dad69558656e1bd94ebea43ba8da2cb4c10dc8f3b04c

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