Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a8ea71b3e35d52…

MALICIOUS

PDF

33.7 KB Created: 2020-08-28 00:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 58ef7a651f5acffcb6a5cefed68f9b72 SHA-1: c436916e791c7d64a574b2c1582b408199d69474 SHA-256: b4a8ea71b3e35d52668e4c246abcf00955fa827ee4672049dd24f12735be8590
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, which points to 'https://ttraff.cc/pify?keyword=iniciaci%25C3%25B3n+a+la+organizaci%25C3%25B3n+y+t%25C3%25A9cnica+comercial'. This URL is likely used to redirect users to a malicious site. Additionally, the file exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to benign Shopify domains but also include unknown and potentially malicious domains.

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=iniciaci%25C3%25B3n+a+la+organizaci%25C3%25B3n+y+t%25C3%25A9cnica+comercial In PDF document text
    • http://sakobapoj.biofouling.net/uploads/1/3/1/4/131453630/sobebules.pdfIn PDF document text
    • http://romed.englishrunnymede.com/uploads/1/3/2/6/132695969/wefusovewebav.pdfIn PDF document text
    • http://lafexal.lighthouse-gardens.com/uploads/1/3/1/4/131408024/tinured.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/1/0429/5737/3589/files/definition_du_manager.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2681/6932/files/mapidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/8749/9157/files/dibrugarh_university_bsc_botany_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2571/0750/files/vifuziluxute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7510/9013/files/vurixaruxewagazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9199/2484/files/anemometer_digital.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/adidas_sustainability_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/sobupegupilokaturebido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/8083/1396/files/cavatine_saint_saens_trombone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3136/1686/files/d3_google_maps.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/42804120337.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000432a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x432A 5308 bytes
SHA-256: 4ce09b78a7ba46668e87919da67183b85a5dee97b6a8a7a0419ccebd782c312a
font_01_sfnt_off0000549a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x549A 10616 bytes
SHA-256: 66e0440cc3dd7b4567e8e0fe62a6cb43552a611fc71b814d785d881dd8139a53

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