Malicious PDF — malware analysis report

Static analysis result for SHA-256 814ae66a37fa6d94…

MALICIOUS

PDF

62.7 KB Created: 2020-08-10 05:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d021be937389e2866888f8e60dae83ad SHA-1: c850c0e1a4c83b7c3ddb6bb98231627754c04a38 SHA-256: 814ae66a37fa6d946b5c578333f9648ce055d69f83a5c356db5cad8dfc3ceac8
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a redirector URL, which is part of a link farm designed to distribute other PDFs. The ML classifier strongly indicates maliciousness, and the presence of numerous embedded links suggests an attempt to drive traffic to potentially malicious content or phishing sites. The document body itself is heavily obfuscated and contains metadata from wkhtmltopdf, indicating it was likely generated programmatically to host these links.

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=sejarah+agama+yahudi+ustadz+abdul+somad+pdf In PDF document text
    • http://movab.bigwhitebarnyoga.com/uploads/1/3/1/4/131438641/ligegipunog.pdfIn PDF document text
    • http://files.matchboxgreetings.com/uploads/1/3/1/1/131164159/9886550.pdfIn PDF document text
    • http://files.monicasscarfs.com/uploads/1/3/1/6/131607054/zoziwadem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/93746878839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/6030/9665/files/bridge_to_terabithia_whole_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/79766778021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1908/2655/files/dalenelivulenefozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7634/6266/files/zixavokevenejidafugefefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1423/2984/files/99897523294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4089/1292/files/phn_mm_chuyn_dng_nh_sang_word.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2270/1976/files/fopulikolozijesovijepova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/jojugazumejizeponenekoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/calisthenics_for_beginners_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4660/8794/files/lavovewidawovawegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1892/3686/files/amalgamation_of_company.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/pakijemaxebiwigaxufi.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b9b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB9B1 21456 bytes
SHA-256: 99e21cb3a848e2bb0b22975aaf027bc0abdf68afa0048880ed0eddab99ac60be
font_00_sfnt_off00007635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7635 5704 bytes
SHA-256: d9e23e910738874af6eca60738f218a199084ffc79b67601ba092f2cd13e58e8
font_01_sfnt_off000089af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AF 16116 bytes
SHA-256: 30c0d961965dfce42c1adc8e14b28ecba1b12c32ca57fbef97b0a91ec2af6989
font_03_sfnt_off0000de5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e