Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1e85b836b972b6…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 07:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 45978d17f6d4148247e8bc722d87d2e9 SHA-1: 62784e225838ea79617cbbb5f9117a0a5e65a92b SHA-256: bc1e85b836b972b6fce6a6042d11881f97c45dd37574d792362926291c4d723f
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple links, including one pointing to a known malicious redirector at 'https://ttraff.ru/pify?keyword=anatomy+of+flowering+plants+neet+notes+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or redirection scheme. The presence of a 'download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=anatomy+of+flowering+plants+neet+notes+pdf In PDF document text
    • http://files.mobasseri.us/uploads/1/3/1/4/131406614/7373cd6.pdfIn PDF document text
    • http://files.shadeoftuba.com/uploads/1/3/1/8/131871659/4058afb.pdfIn PDF document text
    • http://files.gsypicframers.com/uploads/1/3/1/4/131438008/javobawidil.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/1/0432/7315/8806/files/93075334450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/84136044753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/21920803143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/89942713183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9953/8087/files/sizatolelavomenef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fawalonilon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6484/2647/files/97151812767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/fapewojeretov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1791/8870/files/1831012062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2814/2501/files/les_nergies_marines_renouvelables.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/pafikazevuvuz.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_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 5332 bytes
SHA-256: 4eda48918168c4e193b4c4123042a597fc4671e1010ada18830edda5f14c95cf
font_01_sfnt_off0000764b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764B 9740 bytes
SHA-256: 521c9832ef50cbc09d1353e900a7cfa2ed41be11eef1edecdf3c9ae159d2dc0d
font_02_sfnt_off0000979d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x979D 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c