Malicious PDF — malware analysis report

Static analysis result for SHA-256 c13aae9d4f1b9491…

MALICIOUS

PDF

45.4 KB Created: 2020-08-23 18:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7092ce7f1a2ae2b80742144cc0adfb87 SHA-1: 48c832a368f9b760f7221382532c098991c52585 SHA-256: c13aae9d4f1b9491733586925bd7643f9e397c4497885e2ed3049835834b0818
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to a link farm hosted on Shopify. The primary malicious indicator is a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. No scripts were extracted from this sample, and the document body was heavily obfuscated.

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=craft+cms+contact+form+attachments
    • http://files.wastelandarade.com/uploads/1/3/0/7/130739810/8831818.pdf
    • http://kokowod.allthingscpr.com/uploads/1/3/1/4/131453501/6221289.pdf
    • http://files.havewoolwewilltravel.com/uploads/1/3/1/4/131437736/5786132.pdf
    • http://files.parenting-examiner.com/uploads/1/3/1/4/131437619/zekigun.pdf
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/47803914597.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40169505762.pdf
    • https://cdn.shopify.com/s/files/1/0445/4517/9807/files/adda_247_app.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/96278755046.pdf
    • https://cdn.shopify.com/s/files/1/0429/5426/0633/files/hardy_weinberg_equation_practice_problems_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/7702/6463/files/john_deere_185_hydro_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/1428/9568/files/filter_data_in_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61238086127.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/38735654822.pdf
    • https://cdn.shopify.com/s/files/1/0432/1896/0545/files/zegifad.pdf
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/42568927216.pdf
    • https://cdn.shopify.com/s/files/1/0429/8552/1311/files/bise_sukkur_inter_result_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/kanivatetipafisewaw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065ac.bin
0a2ce5fc30a52b3bde9e072b1614261464d03409d34976e35ea909fc135ffb3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x65AC 4852 bytes
font_01_sfnt_off000075e8.bin
3831bb5b78d8405396a2b9115c96c7354a265c6cfd2bbd15ad03ff58bec22a63
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 10748 bytes
font_02_sfnt_off00009a9f.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A9F 4324 bytes