Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7fa4cfbaf1a606…

MALICIOUS

PDF

42.4 KB Created: 2020-09-06 23:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c21c453b8f6c4b289097cfff050243e2 SHA-1: e2f4b8060515896e6df0c10c00a776d2a61257de SHA-256: da7fa4cfbaf1a606cc7cc283fc221b812c0aafa9c50f7f2b7549b799a758fb42
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to SEO-optimized PDF files hosted on Shopify and static.usrfiles.com. One of the primary links directs the user to 'https://ttraff.club/wix?keyword=date+calculator+application', which is flagged as a malicious redirector. This indicates a likely attempt to lure users to malicious infrastructure, possibly for further exploitation or phishing.

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.club/wix?keyword=date+calculator+application In 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/1/0434/3149/3784/files/hp_2530-_8g-_poe_switch_j9774a_firmware.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/1503/7082/files/89925233563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/bizhub_c224e_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4302/7104/files/situacion_didactica_sobre_el_dia_de_muertos_en_preescolar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/zuratusefidisogax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/5862/0574/files/aashto_m251_free_download.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cfa91a_ec87a82bd63a4286af3162aea99a0816.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cf14a4_6b9d85b6ccab47eabc5206c32b888c39.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/76156b_746acf7d1616433b8ea856027fa40136.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8b97dd_03a9fd0be7f84f49b2aff9e54e3223f5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/44b221_814a334819594b63a04017122382c513.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_dcd2d19f2e0347388e6efd2680f7a612.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5bb01c_6407f7057e634067ace1af013cf8e1ad.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/88a84f_06b9cf187d34407e965d2f0903fb3e77.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0cd019_47368393c4dd44de93f88ed181fb94a4.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 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEA 4748 bytes
SHA-256: cc73357b80c22cadc499b676fa680fbf9edd5c5f5e0772de0657ac5bbc270ab8
font_01_sfnt_off0000701e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701E 1964 bytes
SHA-256: 1d18534733479c870a78c46a90b83ed8aff410c3511f6838c5b83347f92bfa48
font_02_sfnt_off00007978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7978 10248 bytes
SHA-256: 366d61aebec01543514aaa01da92a7cd80583b01dd35880fbc54fa00718d1f48

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