Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63445e120ac66aa…

MALICIOUS

PDF

40.3 KB Created: 2020-09-14 13:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2b3d7ee69d3a15901871d301059ed4af SHA-1: 319be9ac688e5dc2aa8ae0349cd0c24e636c3bfc SHA-256: d63445e120ac66aa4f176da843c67a835e6ac6d1c17e397ecb9eede7983f78e5
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'wifi repeater manual pdf'. This link, https://ttraff.link/wix?keyword=wifi+repeater+manual+pdf, leads to known malicious infrastructure. The document also hosts a large number of external PDF links, many of which point to the static.usrfiles.com domain, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. No scripts were extracted, and the document body was heavily corrupted.

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.link/wix?keyword=wifi+repeater+manual+pdf In PDF document text
    • http://files.amsphotographyllc.net/uploads/1/3/1/8/131856949/2077342.pdfIn PDF document text
    • http://files.thedragonshoard.net/uploads/1/3/0/9/130969576/c27d731e5f.pdfIn PDF document text
    • http://domakigow.agiesesldiary.com/uploads/1/3/0/8/130874496/1474993.pdfIn PDF document text
    • http://files.liquidsunshine2u.com/uploads/1/3/1/8/131856071/fimesexu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b28ae2_01e07d777e314ccfa2e2e3106caf60be.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/77941b_e209a79e04c1426baa20da7c2b4d92fa.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f3bfbb_e1bf10c93afd49fbbcec657eba6c805f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5926b4_5d32020b85f7416c9202e9c2d7e45685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/87686273694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0790/7752/files/sonic_2_xl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/zibixeremajavamawalunide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/waltz_of_the_flowers_violin.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bbdb65_939782c0abd045e68497d719fba6652d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cabbb_2f01ba9ba7584e24ace59d7e2e7d13ee.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A4 5020 bytes
SHA-256: 49a9747f7b4dc805c23f851d0a33ba369cb98a5c843d2c0c80bd7e223c56a078
font_01_sfnt_off000072b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B1 9936 bytes
SHA-256: 589feb5e12a1c5f90705b1ae65fee6af104dad826d79a7df409510d3b3333009

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