Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd74d9139c20a18…

MALICIOUS

PDF

39.5 KB Created: 2020-08-16 18:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f58e644ba3a01135d87cc509d643a8c5 SHA-1: f113bd09f1e59924859015c499920026a22e4776 SHA-256: 8cd74d9139c20a184a68491612426cac35dd2ae0574a838bdefc0131bafc12d6
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a malicious redirector link pointing to ttraff.cc, which is a known malicious domain. Additionally, it hosts a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO poisoning attempt. The document body contains garbled text but also includes the malicious URL and several benign-looking PDF URLs, likely part of the link farm. No scripts were extracted, and the primary malicious activity appears to be the redirection to the malicious URL.

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.cc/pify?keyword=bitmap+get+type+android
    • http://files.careplusone.org/uploads/1/3/0/7/130740258/89b0b85b.pdf
    • http://dunax.cplproducts.net/uploads/1/3/1/4/131438477/4691057.pdf
    • http://files.newfoundlandponies.org/uploads/1/3/1/8/131856125/1d676de7742.pdf
    • http://zisig.boafboutique.com/uploads/1/3/0/9/130969265/zalemesoxof-mubagofumaf-disomimu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/24936000735.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/11080261664.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/makeup_artist_resume.pdf
    • https://cdn.shopify.com/s/files/1/0437/3469/6097/files/tuercas_y_tornillos_libro.pdf
    • https://cdn.shopify.com/s/files/1/0437/8542/0949/files/post_order_traversal.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/55307777503.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/free_cash_money_gift_cards_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6839/9524/files/99097640159.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/poor_economics_abhijit_banerjee_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0418/9096/files/65352263702.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_off00005e1e.bin
2178439f6235b3368020893d7f3ebff0be79518a65b01c0009d474e342579457
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1E 5220 bytes
font_01_sfnt_off00006fc4.bin
ae19df8bedd48704d2d72fd780af3e404ac69b000f98716ad0fe5dbf42497832
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC4 9964 bytes