Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cff36c4138f73ca…

MALICIOUS

PDF

110.4 KB Created: 2020-08-09 00:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d153fb41814b1ea7d8b0f5b9a5c6464f SHA-1: c0bdd6f5f50c3174f9ca6f7aa9842925e9e28db8 SHA-256: 2cff36c4138f73ca00ec67df5a4e3c1fdc007aecd436b4a2917c1f79a1143c54
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are part of a link farm designed to improve search engine rankings. One critical heuristic identified a link to a known malicious redirector, https://ttraff.cc/pify?keyword=asian+history+pdf, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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=asian+history+pdf In PDF document text
    • http://files.animalmystic.org/uploads/1/3/0/7/130775743/kewezujiko-dumoregoso.pdfIn PDF document text
    • http://files.texasamericanart.com/uploads/1/3/0/9/130970014/b71660437.pdfIn PDF document text
    • http://files.brianboydmotorsports.com/uploads/1/3/0/8/130874642/8712781.pdfIn PDF document text
    • http://files.thepurplepetalstore.com/uploads/1/3/1/4/131455463/3568661.pdfIn PDF document text
    • http://files.brandonmoorecomposition.com/uploads/1/3/1/4/131438766/muxigem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5241/7703/files/61076060894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/frases_en_ingles_para_dummies_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7795/8816/files/functions_of_vocational_guidance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4839/3112/files/explain_the_8_millennium_development_goals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6099/9830/files/43846105183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pifafesilepobusofamut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/54975731512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/pimetolite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/38912300883.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/gusabedojizesilig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1909/0595/files/pass_compos_avoir_etre.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8692/1374/files/lazonikawute.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15518 5016 bytes
SHA-256: 33bff7b2b2fd0955258ad552080fdfa0de155701b3f9ec838c1a000ab7f27131
font_01_sfnt_off0001666a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1666A 5188 bytes
SHA-256: dc421a2fd8e5c2f17307b3a6cb801e84370bd97a50c26117d1055881675c7855
font_02_sfnt_off00017815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17815 11724 bytes
SHA-256: b366811bfb0e95e333c3dbf86ef82e6dc827337a693ede27790bbe48e163faa5
font_03_sfnt_off00019de0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DE0 3584 bytes
SHA-256: 470f5d67714cde75e6e268dcd64d5a083a78118cf1b5f422527fa529c196211b