Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86cc8d8d1ec7470…

MALICIOUS

PDF

46.9 KB Created: 2020-08-11 05:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e9a6d5c58ce85ce4f20e9b1e94288ba SHA-1: 76ec79b7695c8a1df1cb0291857230c7a88b4c92 SHA-256: d86cc8d8d1ec7470e03eaf7cb2a30bf80e35378bbc8c0f0d977d92ce4e901de0
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs. One critical heuristic indicates that the document links to a known malicious redirector at 'https://ttraff.ru/pify?keyword=asfixia+neonatal+2020+pdf'. This suggests the document is designed to lead users to malicious 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.ru/pify?keyword=asfixia+neonatal+2020+pdf In PDF document text
    • http://files.rootdown-riseup.org/uploads/1/3/1/8/131871705/memuporutowul_mapabileduf_gexuse_bulapowenolovor.pdfIn PDF document text
    • http://files.ysgolcybi.com/uploads/1/3/1/6/131606407/0f7fe.pdfIn PDF document text
    • http://files.phytocapital.com/uploads/1/3/1/4/131407102/0ab0c36.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/1/0436/9547/2794/files/convert_html_file_to_linux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/jekojazevabuvim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1268/4967/files/dipibagidinuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3980/7893/files/6142953950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2447/4531/files/60743739373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/depreciation_accounting_journal_entries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/57542485303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/49773321554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9644/6878/files/glee_seasons_4_episode_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4766/9160/files/massey_harris_44.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/4133/0076/files/black_ops_2_steam_key_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8318/5819/files/basic_classical_guitar_method_book_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0668/1497/files/48837771822.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_off000063c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C6 5268 bytes
SHA-256: d6cf89bea868715cf7e6f285cd1419009e124338149e1c03d9ffd75cf40315e3
font_01_sfnt_off000075c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75C2 10384 bytes
SHA-256: 9e4e1674d49afdced6d0db3c607379c153595bf318153bcc9f4326ed46e5a5ef
font_02_sfnt_off00009987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9987 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e