Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3d9ddd28ec7828…

MALICIOUS

PDF

48.5 KB Created: 2020-08-12 22:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ccc011d2576773ef6ca244e000b423eb SHA-1: 2b6dabee27f06fcd29f5e3537dd4ab919771cd56 SHA-256: 7a3d9ddd28ec782889726632e8f7918da0ba67f8e64a4ba6776424fcf6333bcf
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to a redirector service at 'ttraff.ru' which is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting a lure related to 'dosis antasida pdf' and references the wkhtmltopdf tool, indicating it's likely a crafted document. The presence of multiple links to external PDFs, including benign ones on Shopify, suggests an attempt to mask malicious activity within a larger link farm, potentially for SEO manipulation or to distribute further payloads.

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=dosis+antasida+pdf In PDF document text
    • http://files.jowaholland.com/uploads/1/3/2/7/132710676/temedek.pdfIn PDF document text
    • http://budipusi.kaybethavery.com/uploads/1/3/1/0/131071164/ziwakug_gakofebavomid_difawinigo_basaterodakorof.pdfIn PDF document text
    • http://files.tarynurushido.com/uploads/1/3/0/7/130776162/23fc781.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/1/0433/4403/5993/files/comparing_strings_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5711/8374/files/how_to_send_a_message_discord._ks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rofimoluxita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1337/3084/files/80795088942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/bemupog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gibowutobarifokegibig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9385/9240/files/58109032994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6962/6781/files/38753002528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2030/3006/files/tekujubumuvulewinikuruvur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6670/4550/files/gegisozubomuvinarumox.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 2

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_off000074e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 4576 bytes
SHA-256: 8c262a650cc2ed9d7fe382f0518abc88b3c6a1a00d942783b55349f9a4478164
font_01_sfnt_off00008473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8473 10120 bytes
SHA-256: dcee8858dd2be31200a49fec1c3f0b81dd5514bc033f4af1baf4fcaae1554b95
font_02_sfnt_off0000a708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA708 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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