Malicious PDF — malware analysis report

Static analysis result for SHA-256 a93025a650bd0105…

MALICIOUS

PDF

41.4 KB Created: 2020-08-19 19:59:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9b38b7be59ffb331ff0016bd4b0a0cd3 SHA-1: 141aeb333aaaee315700a7db31157adafd299296 SHA-256: a93025a650bd01050a5a4f636b6673cf8e3cecd6e20c38c96c2ad03d17ff586b
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large external PDF link farm. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely leads to a phishing or malware distribution site. The document body contains garbled text and embedded URLs, reinforcing the link farm heuristic.

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=suara+burung+nuri+hitam In PDF document text
    • http://files.waterislifebeads.com/uploads/1/3/2/7/132740204/xumabi.pdfIn PDF document text
    • http://files.greenlightbikes.org/uploads/1/3/0/8/130873787/fatelexelewavi.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/1/0432/6676/9054/files/catalytic_naphtha_reforming_process.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/70164170471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0604/2013/files/36767618008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7235/2419/files/lord_of_the_rings_minecraft_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/39939932686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/80722758577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4414/3253/files/guroto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/birakadesov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5783/0293/files/11102590390.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/nutritional_value_of_coconut_water.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/zadapatofokugigarorokifef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8187/6131/files/suxajejub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/74537720352.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_off00005d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D35 5132 bytes
SHA-256: 57a27ee7ed24ce65c4af9c45fdf15540e3c5139d4c298e23acda850880b3eb9b
font_01_sfnt_off00006e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7B 13556 bytes
SHA-256: 436e33ad63a2034bd636e4db5afef1f514570a993abc01c57fa7ff11585b690f

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