Malicious PDF — malware analysis report

Static analysis result for SHA-256 f835ca2d6cbeb9ee…

MALICIOUS

PDF

48.5 KB Created: 2020-08-12 06:19:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 87651d64da6c7f76afaaa85d95dabfeb SHA-1: 9b2ec26ca632690e28013acca7e8db90c9aa7510 SHA-256: f835ca2d6cbeb9ee78bddd87a371360d8696d645b1c967c70ef956dfa85e9df9
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with 30 external PDF links identified. One critical heuristic indicates these links point to a known malicious redirector infrastructure, specifically 'ttraff.ru'. While many linked Shopify URLs are confirmed benign, the presence of the redirector and the sheer volume of links suggest an attempt at SEO manipulation or a large-scale distribution of potentially malicious content. No scripts were extracted, and the document body was largely unreadable binary data.

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=a+h+almaas+pdf In PDF document text
    • http://files.lvh2o.com/uploads/1/3/2/6/132681296/f6337cb4fd6c.pdfIn PDF document text
    • http://nukige.duraesenterprise.com/uploads/1/3/0/7/130739678/4546183.pdfIn PDF document text
    • http://files.rehanlab.com/uploads/1/3/0/8/130814340/zabimorokasikemoze.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/1/0438/5865/7430/files/matplotlib_update_plot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7580/6119/files/92248075620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9445/0078/files/western_stoneware_price_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1653/1617/files/general_cognitive_ability_test_telkom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/69648600376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6086/1845/files/adoption_agency_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/vawiwidukitivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7548/4313/files/xikuvedirasopupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1639/6697/files/4634901555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8737/9097/files/kaxavawumederovurowog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/mathematics_formula_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/4402826529.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6794/6648/files/red_trofica_terrestre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/49886874575.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_off000074b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B5 4500 bytes
SHA-256: 9d015a071bbc0a6226b0fc7ab794d80fff487775306eb9472166c72056c9683a
font_01_sfnt_off000083ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EC 10416 bytes
SHA-256: 6845b7cd3dff4b84fd882fa80a12743680e73ff7da711b561b0ec775aedb8368
font_02_sfnt_off0000a73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA73D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2