Malicious PDF — malware analysis report

Static analysis result for SHA-256 c39899828b839ee1…

MALICIOUS

PDF

103.2 KB Created: 2020-08-06 09:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27ef358be839103b5454a9f30fab4711 SHA-1: 61275970ba12a8918a94e9983aca23b763f9d43d SHA-256: c39899828b839ee1826578351922f50718d0e9446937473149b7348e5fffd786
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The ML classifier strongly supports the malicious nature of this PDF.

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.ru/wb?keyword=buku%20teknik%20lobi%20dan%20negosiasi%20pdf In PDF document text
    • http://files.pawneecityactivities.org/uploads/1/3/0/9/130969693/nekomonane.pdfIn PDF document text
    • http://fulodipef.studiosamuel.org/uploads/1/3/1/4/131437948/puwokejuvazowebu.pdfIn PDF document text
    • http://files.wildaboutwampum.com/uploads/1/3/2/6/132695575/6941230.pdfIn PDF document text
    • http://files.ballroomdancebyangela.com/uploads/1/3/2/6/132681517/tiwovosolopowiso.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/1/0429/8699/5863/files/modern_auditing_and_assurance_services_6th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/list_of_psychiatric_drugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6284/1759/files/pestle_analysis_of_airline_industry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4472/4133/files/bebotetoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/gulovagux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3685/8775/files/hanuman_chalisa_lyrics_in_hindi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xigemeziguvego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/34840101507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3939/0872/files/comparison_between_dna_and_rna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0506/6907/files/kagigoxemukogupaxox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7124/2391/files/42333054902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/non_parametric_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3654/0069/files/51942629654.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_off00014c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C3E 5248 bytes
SHA-256: 8aea0004eaeac5bf3a53423de77534b1e8fc379466d7794f39a3f6f2aea6399a
font_01_sfnt_off00015e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E27 10240 bytes
SHA-256: c3c923f94ea127dcd3cce5e53ceac90144bdbe850109dceb7b160293d6e3c45a
font_02_sfnt_off000180e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180E2 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34