Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a6b3a95ffff4d6…

MALICIOUS

PDF

81.1 KB Created: 2020-09-05 06:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c06a444318bb7bdbc3df8a84e81026b SHA-1: 696879eec3736fa8aec10ab0ddd5fa4d10ccfe63 SHA-256: 76a6b3a95ffff4d6b1eba0191e5b86150cef0cfba9fe5e4ae517d0c2dc5824c2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to appear as legitimate downloadable documents, but the primary link leads to a known malicious redirector. This suggests a phishing or malware distribution scheme, likely using the lure of free templates to entice clicks. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.link/pify?keyword=yes+no+decision+tree+template+excel In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://linux.thai.net/plone/TLWG/thaifonts_scalable/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7560/0535/files/34752219595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/calculus_made_easy_martin_gardner_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9898/6909/files/dufurumeronegamakilokawe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/calophyllum_brasiliense.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1cc7e8_728fcbe6decb412c836266f8ce6ea605.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cbe7f7_ea6bd7dea6e84e70b210e7965c5d6299.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f3ecbe_9adaaeec52364b65b3a9aa8a93c7b06d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bb13a2_68671cc4e2e44a17adc3e58bcbe319f7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5931/2800/files/american_yawp_chapter_9_quiz_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1124/3164/files/newborn_baby_crying_ringtone.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FD 26088 bytes
SHA-256: 34e79a8265a429a80a9fa9ca00662fb976742c038e381735e813663488c60679
font_01_sfnt_off0000b701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB701 5248 bytes
SHA-256: 2792994b3c2f72ddfa2306af4cec7f9f6fe59bdaf71c58f8ca9511c01b8dc296
font_02_sfnt_off0000c8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BA 9608 bytes
SHA-256: 5c73ccb799d9317c003c2cc914a58324c9c96b93d17a1785738fc35c764bd2a5
font_03_sfnt_off0000e3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A6 15812 bytes
SHA-256: b79d71f36d7b173331807a0ce8610352478026bdb00a2234c8b4f26e4f18d299
font_04_sfnt_off00010daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAF 17288 bytes
SHA-256: b97950783618ee55b000e61ef2bf8f5ede64b5c119d487b755d859dce82c221f
font_05_sfnt_off00012683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12683 7116 bytes
SHA-256: 6812578d90a9333fca257c24eb39390812bed8231ce739e947100a78508c9a42