Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ff45108ebf5c637…

MALICIOUS

PDF

50.7 KB Created: 2020-08-18 17:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 991fb7159e2ee63bd0a9a63904ba929e SHA-1: edd1e34129dc0cdcf81d3471b30a4430211feebf SHA-256: 7ff45108ebf5c637fe90a7622062d449ed18bcda8cef584ce2349b5f5515f086
194 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to a redirector service, which is indicative of a link farm or phishing campaign. The primary redirector URL is https://ttraff.ru/pify?keyword=joker+meme+template+stairs, which is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting an attempt to drive traffic to malicious infrastructure. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence score strongly suggest malicious intent.

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=joker+meme+template+stairs In PDF document text
    • http://files.pro-activemuscletherapy.com/uploads/1/3/0/7/130775462/firevapo.pdfIn PDF document text
    • http://files.keriakvirginhair.com/uploads/1/3/2/6/132681757/vepemoju.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/1/0431/8085/1364/files/11124893708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/employee_self_appraisal_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4204/5089/files/79564127013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/fulefuwigik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/86126780693.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74832969368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/bomanegaxosuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/advanced_excel_shortcuts_keys.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/how_to_override_bootstrap_css.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6518/0314/files/chemistry_lab_equipment_and_uses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2040/0286/files/business_card_template_free_photoshop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/jowugibulugileguri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4111/1712/files/kovebosoj.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_off00006551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6551 5016 bytes
SHA-256: e93f34b63d925feb560c52e131805f1cec62d2b5466361aadb252c47c112791c
font_01_sfnt_off00007649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7649 13992 bytes
SHA-256: 6abb21907a41a280e8c10a958bc9427c3d733d4b98d44f562b27367fe00a534e
font_02_sfnt_off0000a33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA33E 17672 bytes
SHA-256: 3a4638eecdb49a75d59dd3a6d9342f5cf136124eef043efc901be77837571066