Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76ffa91e620f08f…

MALICIOUS

PDF

34.8 KB Created: 2020-08-21 20:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 007278b92b084d80c09296a6a66a83e9 SHA-1: f57738d2ecfecfb6185b10e3dee3c7aa4143749d SHA-256: d76ffa91e620f08f980135f5f551f9b2837207de464e578f0a4c5c19e59fb20c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a redirector service, suggesting a link farm or phishing campaign. A critical heuristic indicates the PDF links to known malicious redirector infrastructure. Additionally, a heuristic flagged a 'Clipboard command execution lure,' instructing the user to copy and paste content into a shell, which is a common technique for executing malicious commands. The ML classifier also strongly indicated maliciousness.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=apache+server++32+bit In PDF document text
    • http://kidaxijot.firesideballoonsforsale.com/uploads/1/3/1/3/131381612/verosuwo-sijakobomuwe.pdfIn PDF document text
    • http://files.mskenny.com/uploads/1/3/1/4/131454151/lagofurose.pdfIn PDF document text
    • http://files.halseyacelab.org/uploads/1/3/2/8/132815298/gojufu-mugopelonedijew-niratosu-bufivizazazefuv.pdfIn PDF document text
    • http://movuzu.nisanifarm.com/uploads/1/3/1/6/131606349/fodupegapirazeme.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/1/0440/1656/6422/files/bazazabejiximopimiboxel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/2020_yearly_blank_calendar_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5309/files/98338654040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/69962188334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/falazipufefiwiwawik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4618/3847/files/ny_ce_200_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/3443/4725/files/86562429895.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7007/0687/files/goosebumps_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4047/2229/files/birezavolizatubamegolokig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/xupof.pdfIn PDF document text
    • https://www.apachelounge.comIn 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 6

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_off00004b38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B38 5476 bytes
SHA-256: 1cbad66cef4683bb33558bfcae2a36466a7bbea3747ffe8ae0a001aec994b923
font_01_sfnt_off00005dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCF 9656 bytes
SHA-256: 1483b4b883844f71168ca4774406dda9a1d539b71a1ddf0eeaef00a0e1384422

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