Malicious PDF — malware analysis report

Static analysis result for SHA-256 871c99cf12931391…

MALICIOUS

PDF

40.4 KB Created: 2020-08-08 22:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f27df4234bf657d9370f3f97d658b8d1 SHA-1: e426a6c87cf953f9a93c85428423ec928115598b SHA-256: 871c99cf129313914f319680da35db31b6c9f9189fb1441e5e4c9f6ea3f0e28b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The primary redirector URL is https://ttraff.cc/pify?keyword=capex+and+opex+pdf, which is likely used to obscure the final destination. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking through to a malicious site.

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.cc/pify?keyword=capex+and+opex+pdf In PDF document text
    • http://files.newleaforganizingllc.com/uploads/1/3/1/8/131857071/6418065.pdfIn PDF document text
    • http://files.leighandbloo.com/uploads/1/3/2/6/132682640/efebc2330fa3.pdfIn PDF document text
    • http://files.bluazul.com/uploads/1/3/0/9/130969999/lixevu.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/1/0430/8946/1410/files/18695412901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/20637607161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/tigir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/pathophysiology_of_lymphatic_filariasis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5269/3654/files/xunovupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/mejidumamumel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3287/0044/files/alter_ego_4_vk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/39005733343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7861/5189/files/vebakowibefos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/23073692851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9462/9786/files/numero_de_masa_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3584/5017/files/34390053047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.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 8

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_off00006180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6180 4704 bytes
SHA-256: 03ac3a1303fb5453ed9ff112afc4d145d8f77af6cc145a9bb5745d90398aa18b
font_01_sfnt_off0000719f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x719F 10388 bytes
SHA-256: 1454d9badee5b5a73eaa04e7c5679b8221a7cc6e85c438c3d5818847f4293267

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