Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8f983a7244c60ca…

MALICIOUS

PDF

49.7 KB Created: 2020-08-19 00:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 320b6d65d0cd7d78b0716b374dd8f025 SHA-1: 5e986676b5390af65a75dfa8b9d376691fcc4295 SHA-256: b8f983a7244c60cad75e16cff81346e4c9a89a417a6a98205ff27d35fecded23
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link farm of 24 external PDF documents, with one URL pointing to a known malicious redirector. The document body text, though garbled, contains the phrase "Apple music invitation not working android" and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=apple+music+invitation+not+working+android In PDF document text
    • http://bunajes.monosdoa.com/uploads/1/3/0/8/130873715/df1b500b668.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/1/0428/3265/8588/files/apostila_aprender_alemao.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3497/6157/files/28295402008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/global_variables_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1255/files/luxenogoboja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5412/0606/files/nolafuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2091/0746/files/contoh_amdal_industri_tekstil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/pisavovositotinoxawekikun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6716/9173/files/chaupai_sahib_with_meaning_in_punjabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/fasegelowemivas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/jatenazuwidorezaja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5726/4280/files/xodamuxowujoxoropenovej.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B77 5600 bytes
SHA-256: f802675fde7d8be6324194e775b67466ec4028bed0ecb4fd534b20d0154b5aab
font_01_sfnt_off00007e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E81 10960 bytes
SHA-256: 7d4838dec188ae590df192b2ae5ed9dc8202a075125a50d270df023827f22b2b
font_02_sfnt_off0000a3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C5 16232 bytes
SHA-256: cb0239a5e77cb37740da0b4997a5f47117ed526887f952b298c44ef8b2f17e18

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