Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7b08807d31b627…

MALICIOUS

PDF

37.4 KB Created: 2020-08-12 09:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf16f36e73b0d2e1f0dd1041b6e8f987 SHA-1: edf5e00735c846052d9a3ecb24aebfe64566c660 SHA-256: cd7b08807d31b6277aee1b8ce00f8ca105092e4af261c5e22ad6f1c7b2831762
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a large number of external PDF links, suggesting a link farm for SEO manipulation. The embedded URLs and the document body text point towards a phishing lure, likely attempting to trick users into downloading further malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=bauderflex+dna+pdf In PDF document text
    • http://files.danielhaile.com/uploads/1/3/2/6/132680986/62694efb.pdfIn PDF document text
    • http://files.millennial-media.net/uploads/1/3/0/7/130776725/luforugag_wifonexodal_vuzakaluworexe_difel.pdfIn PDF document text
    • http://files.sproutlanguagesolutions.com/uploads/1/3/2/6/132681884/6590654.pdfIn PDF document text
    • http://files.stephaniemarceau.com/uploads/1/3/0/7/130775102/xejajivaf_ronaposutubunuf_xefolegegul_vibededikaz.pdfIn PDF document text
    • http://files.amedicinalmind.com/uploads/1/3/1/8/131871938/votavetinalot.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/1/0433/4691/9579/files/fogitasegoluje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9123/7794/files/54721937731.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8022/9791/files/72442038709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2071/2098/files/finite_mathematics_applied_calculus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/69101531636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1995/9463/files/wovalejulum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/84461081950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1383/2857/files/lafipusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/webmail_genmills_com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5845/3928/files/5786507966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/tiwenasok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/bezier_surface.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/vobefazitavodulalitosez.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_off000049b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49B5 4616 bytes
SHA-256: 0de993b4e86c0f3f1c2e8cf6364f271db1b2c4579561674630cbe0f41f7938ed
font_01_sfnt_off0000596b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x596B 9752 bytes
SHA-256: e973f4702f4c4d662d36a621a28723d07d9d15957586ac669e8efafa5f2f033d
font_02_sfnt_off00007aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABA 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176