Malicious PDF — malware analysis report

Static analysis result for SHA-256 875a6e51894fe7e6…

MALICIOUS

PDF

45.2 KB Created: 2020-08-12 19:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 95f19534d1155c18d13db3986e742150 SHA-1: 4132a04a0fff7d318dd115ccad5e97a5e03c2a9b SHA-256: 875a6e51894fe7e6d28cd24d76865a266fe4a03a5ab370c2d79f16ff7e1037e5
202 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' heuristics. The document body text, though partially corrupted, suggests a lure related to 'imprest system of petty cash book pdf', aligning with the 'SE_INVOICE_LURE' heuristic. The primary malicious IOC is the redirector URL, which is likely used to host or deliver 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=imprest+system+of+petty+cash+book+pdf In PDF document text
    • http://files.illuminatethejourney.com/uploads/1/3/0/8/130813931/tukopuzun_zukolujodemezi_jazobe_xegixavasep.pdfIn PDF document text
    • http://fuvuwa.twothreefivenine.com/uploads/1/3/1/6/131606339/6332656.pdfIn PDF document text
    • http://kigowi.wearehopecommunity.com/uploads/1/3/2/3/132303382/tifemuzogimevanidube.pdfIn PDF document text
    • http://dajix.liquorburn.com/uploads/1/3/1/8/131856462/petawogezozazekuz.pdfIn PDF document text
    • http://files.rabbipauljacobson.com/uploads/1/3/2/8/132814241/1655866.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/1/0439/5070/2750/files/les_thanatonautes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3754/1031/files/43632344661.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/20646598585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/nububosamokiletuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5470/1461/files/23339126235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bujebunefevefosilipepeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3028/1381/files/xetovodirojagatuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0311/5682/files/berliner_platz_3_neu_glossar_griechisch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7777/1164/files/teruxolikepexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5526/6457/files/6106968251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5062/3385/files/31497471090.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B1 5240 bytes
SHA-256: 25c7808aaf30f308b9021bb5d6195abd4e2de2950c75021687fd6f68e9520bba
font_01_sfnt_off0000767d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 10352 bytes
SHA-256: badec30f24400ae166eb2a325feeeb1ced2add9a165ab311c4782e53655172db
font_02_sfnt_off000099a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99A4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333