Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fd8b7ea3a66880e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-18 21:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b645fc42fb667353f8399c79aaf31f2 SHA-1: 035293481f13ffb4a05e028094611c7cf60d6518 SHA-256: 8fd8b7ea3a66880e4d2999ff1b6ffcb833250e904cbc78d0816f8964dba09f2d
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, which is also present in the document body. The link leads to a URL that is known to be malicious. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning attempt to distribute malicious content.

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=6th+grade+social+studies+test+pdf In PDF document text
    • http://files.alexandracastelli.com/uploads/1/3/0/9/130969548/tebivilobosuxu_pakat_bozujavadelipaf_lawibumezevetur.pdfIn PDF document text
    • http://meduko.globalexplorertravel.com/uploads/1/3/1/8/131871655/zegibegigigokat-pudupanilujun-zuzagilupabapuk-runilubelobi.pdfIn PDF document text
    • http://files.mismacounsellingservice.com/uploads/1/3/1/1/131164424/8181077eb.pdfIn PDF document text
    • http://files.gargiulocaterers.com/uploads/1/3/2/8/132814166/zafefe.pdfIn 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/1/0429/3417/3859/files/55940569951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/vbox_guest_additions_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/47687923300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8260/4963/files/24291429360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1535/6067/files/immersive_patrols_sse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0091/2282/files/cataloguing_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/67981790832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5092/5223/files/action_bar_hide_android_studio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/95329694112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3685/8773/files/57057953644.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 5

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_off00005dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC8 5476 bytes
SHA-256: 43a2bef62ed985c42546cf7bcf0090714894a6026e758f39fc608363630f7fd2
font_01_sfnt_off00007064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7064 9844 bytes
SHA-256: 7e2adae231ff14cc97e4e986602d4e30f68e011e3bc68e19175c1a08fd2fcdfb

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