Malicious PDF — malware analysis report

Static analysis result for SHA-256 63899e1b42725158…

MALICIOUS

PDF

129.0 KB Created: 2020-09-11 01:47:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6aac19ce7197340e510ba39729d3548e SHA-1: d5e3bce7f207855bb0c6f1a9102c232b77598866 SHA-256: 63899e1b4272515824af94f52823ab627ab0500e24bede3c842c67e5daecd85a
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a lure related to unemployment insurance, directing users to a malicious redirector URL. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm designed for phishing or malware distribution. The document body, though heavily obfuscated, contains the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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=texas+unemployment+insurance+wage+report+worksheet In PDF document text
    • http://files.lowcountrydressforsuccess.org/uploads/1/3/1/8/131860787/e911069092f6.pdfIn PDF document text
    • http://files.ataraxiaphotography.com/uploads/1/3/1/4/131455883/jazozixure.pdfIn PDF document text
    • http://files.annimorris.co.nz/uploads/1/3/0/7/130776611/b16f525ce.pdfIn PDF document text
    • http://govil.sapir-forum.org/uploads/1/3/1/6/131606027/2050827.pdfIn PDF document text
    • http://motozubex.phenixid.com/uploads/1/3/1/4/131453870/lemotosir.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/f5892c_648455a4f624467894e84d71ec31f2f2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0d089b_b4e7227e46dd47688a7e830a315c5f46.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c8df25_96253d2c0f544c5facac49982cbda53b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6985/7176/files/dictionary_english_to_urdu_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/jixujid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0004/4440/files/88823035893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1660/0227/files/26556331264.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4243/1395/files/future_tense_will_shall_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/pomux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/zozaji.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_off0001bd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD6F 5620 bytes
SHA-256: 3a77a2dbc1facc40463fd4065be79cc922bf764107ab2c6912181d4c1a4ba18c
font_01_sfnt_off0001d080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D080 10892 bytes
SHA-256: d25762fb56f4e6bc446cf2e474cc7c2dd1c6370bffcd0949d604b0d6160c168f

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