Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b50eea04001dda…

MALICIOUS

PDF

42.5 KB Created: 2020-07-10 11:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9bc3f5d050edf7cbabb9c170198d0ce SHA-1: 386ab0a72d0ba931584d4e3c3d4a4da6d8a9ebad SHA-256: 85b50eea04001ddaf77c1b4e623cbdd63c656a91e18bec9f5cf47849576ee7c1
130 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link and a large number of links to other PDFs, forming a link farm. The document body text and embedded links suggest a lure related to a 'document to PDF converter'. The primary malicious activity observed is the redirection to external, potentially harmful, URLs.

Heuristics 4

  • 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.
  • 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
  • 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.com/wb?keyword=document%20to%20pdf%20converter%20for%20windows%2010
    • http://files.dorebowen.com/uploads/1/3/1/6/131607174/3994866.pdf
    • http://files.antoniodavidsinopoli.com/uploads/1/3/0/8/130873907/4090271.pdf
    • http://files.confidentlyuare.org/uploads/1/3/1/4/131437131/jifemexukutorop.pdf
    • http://files.grandbendsoccer.ca/uploads/1/3/1/8/131871894/mirelukexuger.pdf
    • http://files.orangehistory.org/uploads/1/3/1/3/131380998/6a7d3c8e67aa6.pdf
    • http://files.cathedralmountainknifeworks.com/uploads/1/3/0/9/130969673/miweg_farov.pdf
    • http://files.friendsofembryhills.org/uploads/1/3/1/6/131607575/logile-mojagufebig-jonimuw-kexinokiru.pdf
    • http://files.sprucetopsmn.com/uploads/1/3/0/7/130739571/gusezunusuzeme_pitewozeluxobo_texutefiwimat.pdf
    • http://files.pianolessonsontheweb.com/uploads/1/3/0/7/130775700/gilekefiwo-nuruwa.pdf
    • http://files.sydneynewhorizons.org/uploads/1/3/2/7/132710787/lozaratorepu_tatira.pdf
    • https://xewugof.files.wordpress.com/2020/06/kejidalipin.pdf
    • https://xonijug806904596.files.wordpress.com/2020/07/31143035291.pdf
    • https://xawuwoliv.files.wordpress.com/2020/07/33097103037.pdf
    • https://kolurinitof.files.wordpress.com/2020/07/73036539653.pdf
    • https://tojufedeken.files.wordpress.com/2020/06/90547429407.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/14985018959.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikoleluvotejagumali.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/22650439267.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006836.bin
a9187057d362df79fb183d3070e3a614f16b7ae8673bd3931bd5c24c848010ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x6836 5288 bytes
font_01_sfnt_off00007a3e.bin
588a88523f6fa99a2a7ce6abed2118301f431d2d1bce297605cea1c6345d7bd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3E 10128 bytes