Malicious PDF — malware analysis report

Static analysis result for SHA-256 00005636019464b6…

MALICIOUS

PDF

40.5 KB Created: 2020-09-08 03:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e48b9f18b1496bc3c19016a82224ebfa SHA-1: 1fbb0fd0f53ddebbf8ed1347ff400ea92c0cd186 SHA-256: 00005636019464b6148bf20ef5323b981a0055b5cacc9946877bc94099b5cb4b
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link and a large number of embedded links, many of which are to PDF files hosted on Shopify. The document body text, though partially corrupted, mentions "Blue Prism email attachment" and includes a URL that appears to be a lure. The presence of a "visual download / call-to-action button lure" heuristic and a "password-protected archive handoff" heuristic suggests the document is designed to trick the user into downloading a payload, possibly disguised as an archive requiring a password. The ML classifier strongly flagged this PDF as malicious.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.club/wix?keyword=blue+prism++email+attachment
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1802/6141/files/52132758938.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/yasin_dan_tahlil_ringkas.pdf
    • https://cdn.shopify.com/s/files/1/0436/8944/3483/files/76698811277.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/kaganobenoziwewudavoz.pdf
    • https://cdn.shopify.com/s/files/1/0438/0947/2669/files/zokevujumal.pdf
    • https://cdn.shopify.com/s/files/1/0431/1977/1799/files/48681085783.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5098/files/43464563955.pdf
    • https://cdn.shopify.com/s/files/1/0433/8080/1701/files/4233955591.pdf
    • https://cdn.shopify.com/s/files/1/0432/6552/3870/files/ansel_adams_livros.pdf
    • https://cdn.shopify.com/s/files/1/0433/7742/6584/files/86515006065.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/free_brass_band_music.pdf
    • https://static.usrfiles.com/ugd/70094d_29b34df9ea9b4913909ff8981020b468.pdf
    • https://static.usrfiles.com/ugd/930050_3aeee2a4cf414bdfa3f5210cff74f3c6.pdf
    • https://static.usrfiles.com/ugd/91e123_65fbcebf13fd4cbbb5a9b6a1bbe579c8.pdf
    • https://static.usrfiles.com/ugd/253000_b5e243081dfc40a0a1c8862377ec7e65.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006023.bin
f3c9effb6b4754c1064fd99eb4d07af7b005141bd7d85aaf494e7a6d5645899a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 5224 bytes
font_01_sfnt_off000071b7.bin
613f7d065b48b23bd193cfd38e5b1751433bd6af370b0d0e6fdb6eeaed4f8853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B7 10244 bytes

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