Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3ef52ef39642b3…

MALICIOUS

PDF

38.2 KB Created: 2020-08-10 11:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3dcafc69bf180e27138d4fd78666462e SHA-1: 6bc7a38475b79856d4d6a428cbd08e1d4324c64e SHA-256: fb3ef52ef39642b30f175d1330356da5f54cf18604569c187a0b95a7f5e8f809
194 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to a redirector service (ttraff.cc). This indicates a link farm strategy designed to obscure the final destination. The primary heuristic firing confirms that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing the malicious intent. No scripts were extracted from this sample.

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=boundary+value+problems+and+partial+differential+equations+david+powers+pdf In PDF document text
    • http://lokuj.stoneycreeklabradors.com/uploads/1/3/2/8/132816066/caf669bada8.pdfIn PDF document text
    • http://files.pontevalle.com/uploads/1/3/1/4/131438282/desatiwivorizov_waviguzukufasu_xomizokoni_pedigukijezajed.pdfIn PDF document text
    • http://files.shainahardie.com/uploads/1/3/2/6/132680986/jivedamu_maxesat_tofanome.pdfIn PDF document text
    • http://files.ladyliftersgym.com/uploads/1/3/1/4/131438464/sozubokisilozus-lutapikij-diselijonexe-vagologexipawod.pdfIn PDF document text
    • http://files.kumanokodoguides.com/uploads/1/3/0/7/130776003/releweba.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/1/0433/0687/7080/files/mojijemorewowasimagaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3791/7333/files/94529903138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3758/5571/files/what_is_john_kerry_s_net_worth.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4373/4172/files/73130259769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7099/4085/files/bafulunifedamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7741/8651/files/4152737997.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1758/4285/files/52084384048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zeperilifo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7388/7649/files/psn_purchase_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/lewanokinagixamofavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4100/5480/files/didoxemusubimarafowetaroj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35031547028.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_off00004964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4964 5640 bytes
SHA-256: 46741fbabc6f917d3315b15c2d3550ff343df11a52e64407d0e38f11eb634e64
font_01_sfnt_off00005c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C87 9472 bytes
SHA-256: a3f65043b56b8df4e0b482d014bca14b3fc8ccb8c2baf4dd65c1a9bf4827e697
font_02_sfnt_off00007cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDE 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f