Malicious PDF — malware analysis report

Static analysis result for SHA-256 db54ab3880e04482…

MALICIOUS

PDF

46.7 KB Created: 2020-08-14 04:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bb970f2c3e0326ee0afbdebff201762 SHA-1: 90ada2e2b406d5735f0c2253bb82332035b4326d SHA-256: db54ab3880e04482336c7d07f1f8377ee5d4d4779e622be107385c20e0543342
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to `https://ttraff.cc/pify?keyword=livros+ap%25C3%25B3crifos+da+b%25C3%25ADblia+pdf`. This URL is likely used to redirect users to a phishing page or to download further malware. The document also contains a large number of embedded links to PDF files hosted on Shopify, indicating a link farm used for SEO poisoning or to obscure the malicious redirector. No scripts were extracted from this sample.

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=livros+ap%25C3%25B3crifos+da+b%25C3%25ADblia+pdf
    • http://files.cedardesigns.com.au/uploads/1/3/1/8/131857734/burojuwuga_zodatugibukopa_xuserinalagi.pdf
    • http://files.agnihealth.org/uploads/1/3/1/4/131438639/3028161.pdf
    • http://files.withgracephotography.com/uploads/1/3/1/3/131381540/misajeta_lewobiti_kuvisibozuvipu.pdf
    • http://files.destinwestvacation.com/uploads/1/3/0/7/130776712/8330495.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1264/files/vewigutinakuwukuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/jupojarogofukufesima.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/xiwupatesulil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4447/8874/files/awk_and_sed_commands.pdf
    • https://cdn.shopify.com/s/files/1/0431/8219/4852/files/55405661124.pdf
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/kufasagimufofupatemolu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/gorinuzakiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/9899/4856/files/letisuwubevasijewel.pdf
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/25598471077.pdf
    • https://cdn.shopify.com/s/files/1/0447/3857/6533/files/download_cracked_ipas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67142307476.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8927/files/gelanojew.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_off000073c7.bin
fa39ff548d736a1e1f68f683d59c71ca557b53148c6643a95c52819538210658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C7 5480 bytes
font_01_sfnt_off00008637.bin
11499fde5ebcf1aa097abf1e9df223b01a535b8229052dd082e75229f096c69f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8637 12428 bytes

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