Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a9ecec2bcc559d…

MALICIOUS

PDF

47.2 KB Created: 2020-08-11 15:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 827194a83fb742fb3af33fb5fda3117b SHA-1: 384b6f325e8c84a7ec1ca68ca7a27c5c1a27ab64 SHA-256: c8a9ecec2bcc559db1789838064b345908251eeec0312d8916eb3c8f0b518d77
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 are hosted on domains commonly used for SEO spam and link farms. One critical heuristic firing indicates a direct link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to the links, suggesting a lure to download further content.

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.cc/pify?keyword=the+life+of+the+buddha+bhikkhu+nanamoli+pdf In PDF document text
    • http://files.nickidenicki.com/uploads/1/3/1/6/131636947/keguxusanilipel_xilikekonepo.pdfIn PDF document text
    • http://zovugas.jesmicjewelry.com/uploads/1/3/0/9/130968996/b0f7501dc46d.pdfIn PDF document text
    • http://files.crowncharlotte.org/uploads/1/3/0/9/130969681/mewevan-wibuxamumabavok-dovexugibo.pdfIn PDF document text
    • http://files.willowstogo.com/uploads/1/3/1/4/131407135/731771.pdfIn PDF document text
    • http://files.qrufundraiser.org/uploads/1/3/0/7/130776486/nuwarelebawuxi-jizaxeru-taxulasobup.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/1/0437/6671/0429/files/place_value_chart_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/60967602779.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3469/6097/files/majibis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/22168299118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6621/2003/files/36082401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9861/9550/files/warogeturorofikewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4925/4050/files/cyrano_de_bergerac_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/ada_2020_diabetes_gestacional_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/8783961004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7309/3288/files/57153757352.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/dexopemexododad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4854/files/agriculture_information.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9743/0941/files/arquitectura_de_computadoras_utn.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2E 5160 bytes
SHA-256: 43b02790e0eb4360c153853b755f4d0693c06de9ee6d17fc7d71baab59bb0fc1
font_01_sfnt_off00008b8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8C 10652 bytes
SHA-256: 5e8d855e3d4cef778e19046fa18b65677968b6d4976219d92c2ab78e3a3a7c65