Malicious PDF — malware analysis report

Static analysis result for SHA-256 def87e0b56f79cae…

MALICIOUS

PDF

42.8 KB Created: 2020-08-03 05:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8c515bc4588b780d99bcfa78ff557cd5 SHA-1: a3ee30d7833a60dd29451aa62c3cdb710a0b3a23 SHA-256: def87e0b56f79cae6efceb9e465f3cbd96cf60159f91809d3042feb7f3a391dd
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=google+wifi+centurylink, which is likely used to redirect users to a phishing or malware-hosting site. The document body contains garbled text but includes the same malicious URL, suggesting it's part of the lure.

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=google+wifi+centurylink In PDF document text
    • http://mixafuzum.curtainrepair.com/uploads/1/3/0/7/130775320/7348583.pdfIn PDF document text
    • http://files.immortalinquiry.com/uploads/1/3/2/6/132681910/a1f81556885a0.pdfIn PDF document text
    • http://files.savannahsclayspot.com/uploads/1/3/1/1/131164097/subuv_nomame_fejipitop_tubijakater.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/1/0431/2812/7645/files/nezavivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1560/1319/files/bedelemojixuruxopuledaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/74612001994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9218/1153/files/sogitasozarov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4558/7877/files/download_os_x_10._11._4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/51229287536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/pemajufubakilufoxosidoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2599/7722/files/gurexejib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5174/5442/files/3919368520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5355/5624/files/45409942364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7053/8406/files/petufefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32808714247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/38781228092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6254/9910/files/64530585169.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 2

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_off000068a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A7 4952 bytes
SHA-256: 8059e8be0c661318ffed3d3699acbcb3ce153c6a9a096a3f4cf0037dabcc1207
font_01_sfnt_off000079bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BB 10860 bytes
SHA-256: 4aa0f7b6b49e6eecfb6ea16e0677a1eb7f47a539b9d3acf97ef9c7b373b21262

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