Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6cf06cd8e5cfea…

MALICIOUS

PDF

114.1 KB Created: 2020-07-26 07:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0173c77054145dc4cbcbc98ca533d33c SHA-1: 21fb42a47ae489a849d2a95b39b9f2bb83ed162c SHA-256: 7c6cf06cd8e5cfea0d64233bd842ee8959802f3620d15a918fe5b41f54a70217
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, appears to be a lure for 'lean six sigma black belt training pdf'. The presence of a malicious redirector and a large number of outbound links suggests an attempt to drive traffic to potentially harmful sites, likely for phishing or malware distribution.

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.com/pify?keyword=lean+six+sigma+black+belt+training+pdf In PDF document text
    • http://files.ren-ito.com/uploads/1/3/1/4/131483110/d686905359d71.pdfIn PDF document text
    • http://files.kristina-mazeikaite.com/uploads/1/3/0/7/130775231/6753322.pdfIn PDF document text
    • http://files.cardiologycarolina.com/uploads/1/3/0/7/130739069/6441498.pdfIn PDF document text
    • http://files.bigskywords.com/uploads/1/3/0/8/130813841/0999726961470.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/1/0432/1217/7572/files/fibulazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/95509007145.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/64667291573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68736518606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7088/9892/files/19501210309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3789/1477/files/dumekavinafuded.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/69926707646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6224/7080/files/79366676475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9356/5342/files/suwisokexajobaneveg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/filonokifefoviwevan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0426/4602/files/lugowobitowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54183348773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/64396447222.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001677b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1677B 5368 bytes
SHA-256: e5ddcf87b984228bd2484228f52ed603eb1c939ce2f9c70404d77728b37e2272
font_01_sfnt_off0001799e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1799E 13724 bytes
SHA-256: 441c6d6725c37e72a93c46ff2114f7716cb721004d5e0378280fe9471dd5f13c
font_02_sfnt_off0001a5b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5B7 16060 bytes
SHA-256: 713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74