Malicious PDF — malware analysis report

Static analysis result for SHA-256 79cdd69dcb2e1e9e…

MALICIOUS

PDF

49.3 KB Created: 2020-08-26 08:04:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 058e1e335f59d062997339c89ecda7a8 SHA-1: 9f005f35c1ee5415b32cc05452652276febe308c SHA-256: 79cdd69dcb2e1e9e1fe449ced13d199a0c12be14e475b0fd2600bd739f9823ac
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirectors, with one specifically disguised as a Dell advertisement. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a strong attempt to lead users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed for phishing or malware distribution.

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.com/pify?keyword=dell+2+in+1+13 In PDF document text
    • http://files.aubrieadams.com/uploads/1/3/1/3/131379815/08ee0f82b40ac9.pdfIn PDF document text
    • http://fivifi.nancykasprzyk-colorado.com/uploads/1/3/1/8/131856516/f320a83ceb.pdfIn PDF document text
    • http://labebonar.called2lead.com/uploads/1/3/1/6/131606069/2ca1c9.pdfIn PDF document text
    • http://vagoju.alliesonthejourney.com/uploads/1/3/1/4/131407406/2ed34f397b.pdfIn PDF document text
    • http://zozib.dolsenkinders.com/uploads/1/3/0/8/130813453/abd1e.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/1/0438/4073/3341/files/formal_letter_asking_for_information_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/3542/6721/files/wapomubitukawanojumekatan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9583/4280/files/android_9_pkq1_name.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/tubidy._mobi_mp3_downloads.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4655/2230/files/wepesisiranovepizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/najebelujubanivozukamof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/54313748775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4468/0359/files/xedaxutimexigibozovagovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3093/6733/files/wubazokuzegitetalukek.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C9 4140 bytes
SHA-256: f784e31a9ee14c4ece22c91e5d9e1861b63ada5d35ccab3a574e15881b4b9fc9
font_01_sfnt_off000070d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D0 10552 bytes
SHA-256: 9f5c3d750566486c9cdffea4747b928ab39834474981cb93a5f7018dd225a723
font_02_sfnt_off0000950d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x950D 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off0000aa3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2