Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2f9cc678ace2d3…

MALICIOUS

PDF

38.0 KB Created: 2020-08-11 09:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7efc25ad681df10921195a2e6dc7112c SHA-1: 0b5e8b82bfa89aa1b79680cb9296b205be90dcc8 SHA-256: 7f2f9cc678ace2d37fed9a99cedf1881d2e242a1b3e663620c9362142adf33ed
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO Link Farm' and another flagging a link to a known malicious redirector. The document body, though partially corrupted, contains text that appears to be a lure related to 'Libro materiales dentales barcelo pdf'. The primary malicious URL identified is https://ttraff.cc/pify?keyword=libro+materiales+dentales+barcelo+pdf, which is likely used to redirect users to a malicious site.

Heuristics 3

  • 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.
  • 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=libro+materiales+dentales+barcelo+pdf
    • http://gemubod.crafteli.com/uploads/1/3/1/6/131637814/bawiz.pdf
    • http://files.asccareers.com.au/uploads/1/3/1/4/131437474/6431095.pdf
    • http://files.allisontierney.com/uploads/1/3/1/4/131407148/7257703.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/milikefasozulinusogadiwak.pdf
    • https://cdn.shopify.com/s/files/1/0429/6110/9155/files/raregabafadobe.pdf
    • https://cdn.shopify.com/s/files/1/0429/9315/6259/files/87819182406.pdf
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/accomplishment_report_for_ojt.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6995/files/pdf_kayla_itsines.pdf
    • https://cdn.shopify.com/s/files/1/0433/8905/9228/files/50529903758.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/auditors_report_format.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/51673919971.pdf
    • https://cdn.shopify.com/s/files/1/0433/6238/6079/files/tilabubatojomeludo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8570/9987/files/fikigikuku.pdf
    • https://cdn.shopify.com/s/files/1/0435/0256/7588/files/mixobibevu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9783/files/freecell_green_felt.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_off000052be.bin
3137801ae8c6f27d55ba03db59c8a9587e96f1592dad8fd0a7584c23fee7c8c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BE 5384 bytes
font_01_sfnt_off000064e7.bin
3251ee3258d855a2b0bf4713e53534ff352b13cd17a90e6817cfa88040ea4bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E7 11172 bytes

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