Malicious PDF — malware analysis report

Static analysis result for SHA-256 c429cfa16e5a1871…

MALICIOUS

PDF

44.7 KB Created: 2020-09-12 01:07:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fa8af2d668be2fce83078cd68b03021 SHA-1: d37dc1ca72b3f74e2725f4bf622438ad16dff13c SHA-256: c429cfa16e5a1871a3c15044fbc7b781606abe6efad0dcd31e896dda685bbacd
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, pointing to 'https://ttraff.me/wix?keyword=august+smart+lock+setup+guide'. This URL is presented within the document body, disguised as a setup guide, to entice users to click. The document also contains a large number of embedded links, many hosted on Shopify, which is flagged as a link farm. The primary malicious IOC is the redirector URL.

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.me/wix?keyword=august+smart+lock+setup+guide
    • https://cdn.shopify.com/s/files/1/0455/3962/3077/files/convert_to_cdr_format_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/ruvuvaviwijug.pdf
    • https://cdn.shopify.com/s/files/1/0452/3635/5232/files/attach_together_online.pdf
    • https://cdn.shopify.com/s/files/1/0435/8995/9839/files/ll_bean_flannel_sheets_clearance.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/46994617569.pdf
    • https://cdn.shopify.com/s/files/1/0436/2482/4995/files/kebide.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4902/files/flowers_images_png_format.pdf
    • https://cdn.shopify.com/s/files/1/0429/9037/0975/files/driver_argox_os-_214_plus_pplb.pdf
    • https://cdn.shopify.com/s/files/1/0438/8395/4328/files/saxidapuwosudafivovib.pdf
    • https://static.usrfiles.com/ugd/d94ae5_288321e67634429492f50a8bb9e17081.pdf
    • https://static.usrfiles.com/ugd/952c2e_c0617f733f704217892ff600140b3578.pdf
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/69719890795.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/hillsborough_county_school_board_report_cards.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/aetna_medicare_medical_claim_reimbursement_form.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_off00006f84.bin
cc203f078af559721fb3f37c6088714e4bb7a2dce9f7f5f6b85bfb8fb571736b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F84 5448 bytes
font_01_sfnt_off000081f7.bin
3616321cbd48c02cb3f118f843d7e2bdf52eb98c02990cbd28d8396e81911bd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F7 10468 bytes

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