Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9373275b99f3cee…

MALICIOUS

PDF

45.8 KB Created: 2020-08-24 03:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 35b8ebf2dbda4e387bcbf9eb0c2f391d SHA-1: d03d9912d889c684f189f4b4b15feff58aa13d0b SHA-256: d9373275b99f3cee091a9ddc8434d114e3957be7a6ecd3cbadbf6e584cd53c77
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, contains text related to 'materi biologi sel sma pdf' and includes the malicious URL, suggesting a lure to trick users into visiting potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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=materi+biologi+sel+sma+pdf In PDF document text
    • http://files.brookehuvalart.com/uploads/1/3/0/8/130874642/8662556.pdfIn PDF document text
    • http://kinob.5freespirits.com/uploads/1/3/1/8/131855981/0af82275d.pdfIn PDF document text
    • http://files.the-vintage-villa.com/uploads/1/3/1/4/131483327/ragujelidefuxix.pdfIn PDF document text
    • http://files.pawsitive-dog-training.com/uploads/1/3/0/8/130814110/fipam.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/1/0437/5370/1525/files/26838447686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3009/2712/files/cystic_fibrosis_gene_therapy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7815/6449/files/pedibubisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/3472/1694/files/fate_grand_order_shimosa_boss_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9010/7815/files/69205667503.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0821/2638/files/3963733160.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/35256070325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0499/7271/files/queen_bed_sheets_egyptian_cotton.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7617/2441/files/can_you_feel_the_love_tonight_cello_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2661/1357/files/information_reporting_system_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7525/0850/files/86040849181.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 3

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_off00007411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7411 5508 bytes
SHA-256: c10831a9d5e7069e46e182dbb397bf1d58d7fc87e298a2a543383896194edd3b
font_01_sfnt_off000086b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B2 10732 bytes
SHA-256: 8ebed7bbd41f5cc500de5e05cacdf93ba9c8147a08ed723f179a0b51c2a2fc02

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