Malicious PDF — malware analysis report

Static analysis result for SHA-256 62cf9da95e781c08…

MALICIOUS

PDF

42.2 KB Created: 2020-08-18 13:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: befe384d628639c76ada267519b7a276 SHA-1: 1884659d94e087a58c18e920f29e0538096b1fb6 SHA-256: 62cf9da95e781c0800727ee0478d931a864fc4d8a128782f8a35bc3a6511928b
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a large number of external PDF links, suggesting a link farm. It also employs social engineering lures related to browser extensions and remote support tools, aiming to trick users into downloading or installing further content. The embedded URL 'https://ttraff.cc/pify?keyword=foxit+reader+free++for+linux' is a primary indicator of a malicious redirector.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.cc/pify?keyword=foxit+reader+free++for+linux
    • http://kolota.zarabethduell.com/uploads/1/3/1/3/131383544/xoremezijorede.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8575/8628/files/37461299627.pdf
    • https://cdn.shopify.com/s/files/1/0433/7542/7735/files/xanomu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7732/files/sovabofebigosibojodura.pdf
    • https://cdn.shopify.com/s/files/1/0431/0129/0650/files/rodenubexud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5421/0980/files/redibafonabuzi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/73541391517.pdf
    • https://cdn.shopify.com/s/files/1/0431/1947/6896/files/97403905466.pdf
    • https://cdn.shopify.com/s/files/1/0437/9456/3229/files/cardiomiopatia_dilatada_veterinaria.pdf
    • https://cdn.shopify.com/s/files/1/0437/8601/0776/files/college_algebra_julie_miller_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/iceland_ring_road_map.pdf
    • https://cdn.shopify.com/s/files/1/0433/1978/7675/files/reorder_pages_in_adobe_acrobat_pro.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005aaf.bin
160fd049bbdfb5b0cde82d17480961cf9959d40b5b95f06e9ce2039e00234531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AAF 4628 bytes
font_01_sfnt_off00006a74.bin
f9c1fbdc27e0c655c9136148153ec64cf6e60e2e36bc5d0f815effd72ef4472a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A74 10436 bytes
font_02_sfnt_off00008e2f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2F 4324 bytes

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