Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1b3e9961319aba…

MALICIOUS

PDF

48.8 KB Created: 2020-08-25 15:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 14fb663714e1e1a518dccbdea05900da SHA-1: c92640674a53c60c920222da53b818f9934a8177 SHA-256: 4f1b3e9961319aba598df627c68ed2f9e59d4d418ad4c42d61e4a249c71f8827
202 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading 'jdk 1.8 for linux 32 bit', further supported by a heuristic for a visual download button. The primary malicious URL is https://ttraff.cc/pify?keyword=jdk+1.+8++for+linux+32+bit, which likely leads to the download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=jdk+1.+8++for+linux+32+bit In PDF document text
    • http://files.ajoyfulcreation1.com/uploads/1/3/0/7/130739472/vipisajekuwonoro.pdfIn PDF document text
    • http://nadufewek.smilesandsymphonies.com/uploads/1/3/1/4/131437987/5863769.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/1/0429/9164/8929/files/jafosanobipiwon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/formcontrolname_validation_angular_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6718/6079/files/xifuvovajif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9177/8965/files/tchibo_cafissimo_pure_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/5902059437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3357/files/getesukuxoxutufesuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6466/7810/files/aachen_city_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/lisepop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9199/0430/files/learn_to_write_arabic_alphabet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3913/7702/files/riscos_biolgicos_no_ambiente_de_trabalho.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/ipc_a_610.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_off00007f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F31 5348 bytes
SHA-256: fb6562c11ab26775e4b63e6946e05e48f69b06247e7eebc5e0746f0a34601f35
font_01_sfnt_off00009182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9182 10852 bytes
SHA-256: c0a67a37797dca509c585abc918a4b2c329827dafce3b39f2f8c9731eacbfa34

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