Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff9fb9d979872ec9…

MALICIOUS

PDF

38.4 KB Created: 2020-08-16 20:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f13054c90eafd095a9957ce7a16013e SHA-1: 08ce1029c2df81387c71ad67bb0868b17c9c889c SHA-256: ff9fb9d979872ec928a39a0fee38efa73a2c1721070812e0440eabc7b8f347b6
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=cymera+apk+old+version+free In PDF document text
    • http://files.customironideas.com/uploads/1/3/1/3/131379361/netefodubakex.pdfIn PDF document text
    • http://files.425sqn.org/uploads/1/3/1/6/131606035/9463359.pdfIn PDF document text
    • http://dofap.challenge2grow.be/uploads/1/3/0/8/130873998/fujiwesotafa.pdfIn PDF document text
    • http://tovet.our-topia.com/uploads/1/3/1/4/131437252/deseki_rudimedusodasaj_komapubu.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/1/0433/9535/0684/files/97944688549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8334/2748/files/rerajazoxewepoxejogumiruv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8152/1569/files/bozopakedosejamiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3271/4135/files/9416281919.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0439/4661/files/jidopiwezoverexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/mesumepuperexomijigen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/10243476159.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/75512794214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5194/0000/files/tezuketebenudumizeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9639/2348/files/pegemefuweranagoxelewib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/5791/6577/files/51358684208.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_off000058a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58A0 5320 bytes
SHA-256: 2564148a9b20fd7777f1694e7cc658bb7d0d7596936b19cf03a19cdd1e7e60cb
font_01_sfnt_off00006aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA4 10024 bytes
SHA-256: b8f0b89197bbad677faf1898c5ea46ba822d2fc1884a41850d5bd655915247e7

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