Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da95d5565078f6c…

MALICIOUS

PDF

51.1 KB Created: 2020-09-03 00:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f85c66d43302a98ffb9633d510cda096 SHA-1: 90070ebf117388292f175959dc4b55f721e54453 SHA-256: 5da95d5565078f6c15aad69370f1d5550277bde5c1a9e07cd1dd5313285359de
274 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document contains numerous links to external PDFs, many of which appear to be part of an SEO link farm designed to attract users searching for specific topics. The document also contains a lure instructing the user to copy and paste commands, specifically mentioning 'cmd' and 'attrib', into a shell. This is a common tactic to trick users into executing malicious commands, likely to download and run a second-stage payload from the identified redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • 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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.ru/wix?keyword=how+to+format+usb+using+cmd+attrib 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/1/0428/9580/2527/files/38456646175.pdfIn macro / runtime command snippet
    • https://cdn.shopify.com/s/files/1/0431/9975/8497/files/zizutidefebamofetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/tusizotoxivewowixo.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5d2cf3_2132af1dcb4041239f2b39f9cff992a2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1a89c8_489f73486df9485cb9ecbe1a35f63c2e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b4a829_4fe22e3894424b3fbfa046232af2ae5f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/510691_42473cc80c05405e94e4c386fbdd7134.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/aef5b7_4333b3a335624e7daab5afc149e1f260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9394/0641/files/5790869797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/3425/2188/files/makkar_ielts_speaking_may_to_august_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3317/3927/files/adestramento_inteligente_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2480/9122/files/68912144821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8932/1366/files/21001370981.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4691/8551/files/agile_certified_practitioner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6277/2380/files/28384468000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4145/4240/files/91410629695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7099/6889/files/jiwore.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000088d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88D2 5504 bytes
SHA-256: 4262df67aed2ae337ab29cd19c075de7aed581659bb9c6859e9e5468dea8508b
font_01_sfnt_off00009b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B80 10572 bytes
SHA-256: ba0610f747892d9a947ae385c2ab4351bf89f00710569bcd40f1da68815e06c9