Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a0d7fa5a786e2b…

MALICIOUS

PDF

41.2 KB Created: 2020-08-14 21:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb59584861e2c3bb149d339a07b1b198 SHA-1: b3bf57faf2a1fae03ad264171ef7622a1c8b5a0e SHA-256: b3a0d7fa5a786e2bb8eaac76326f8d2a5cda9cb4d9e9f2477bdf9a3cbae59e35
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. Additionally, it contains a mass external PDF link farm, with many links pointing to shopify.com domains. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be SEO manipulation or a link farm designed to redirect users to malicious content.

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=arabic+calligraphy+fonts+free++photoshop In PDF document text
    • http://files.ballesteroselmer3d.com/uploads/1/3/2/6/132681772/7224420.pdfIn PDF document text
    • http://files.gracespringhill.com/uploads/1/3/0/7/130775698/4502679.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/1/0432/5248/2208/files/32137058839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/7146/5630/files/spotify_mod_apk_new_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8069/9295/files/historia_de_ester_en_la_biblia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/blueskybio_surgical_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8751/2220/files/job_vocabulary_esl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9045/2387/files/wonifujefoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/surviving_sepsis_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/cs_lewis_the_weight_of_glory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/rudutinixinegega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0483/3441/files/matricom_gamepad_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3423/0429/files/puwajuloxemijopuwetotegi.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 5

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_off00006458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6458 5508 bytes
SHA-256: 9e7bd980422786fbd005a6c4f736eeef3f29f6c803feaf625ba78d213195bd49
font_01_sfnt_off0000770f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770F 9636 bytes
SHA-256: 5f5c3acd412616bd879735f25bce6e24fc357347ccb5c1e996bdfe693a1a20d2

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