Malicious PDF — malware analysis report

Static analysis result for SHA-256 7168cbcea7ff1ff2…

MALICIOUS

PDF

66.2 KB Created: 2020-08-04 00:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 44d794d87e363d044be3bdf7f45edf3e SHA-1: 16fc76e493cdf68b93f743036be64cc2a074cd76 SHA-256: 7168cbcea7ff1ff256effb6cc759c34c4f489053f36b232224c4499c523c7a44
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirection and link farming, specifically pointing to a redirector URL. The embedded content, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=blast+furnace+iron+making+process+pdf In PDF document text
    • http://files.forestburgumc.com/uploads/1/3/1/3/131381363/fovimoxebudeduz_dasodubamimit_sozuxapuki_kofomaditados.pdfIn PDF document text
    • http://files.ambricemiller.com/uploads/1/3/1/4/131483148/7312147.pdfIn PDF document text
    • http://files.la-manche.co/uploads/1/3/1/4/131483138/409f0e.pdfIn PDF document text
    • http://files.arewordinglife.com/uploads/1/3/0/7/130739155/fifazewej_nokuda_kimib_wajemiw.pdfIn PDF document text
    • http://files.cruzphotography.co/uploads/1/3/0/8/130815137/dorevirovumimo.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/1/0433/0687/7080/files/73470001672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/nodadowezofu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/xavitojavegojisidibibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2805/4169/files/99998149827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8244/1113/files/nadodedebufoxubisazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1778/0896/files/finelan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/4992/files/diludenavopole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/68903712160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/42914471090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/dupejufebol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2558/7609/files/99581590161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2725/0848/files/ganoluri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/naxejavowij.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C6 5588 bytes
SHA-256: 67047699b564be88bf9083d401b98206b6ac54f88181df7ad614507e234d8224
font_01_sfnt_off0000d6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B7 10764 bytes
SHA-256: 3c06cf022714e559a22a982a236befd804bbffe52778b55d58e1a268262b8766

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