Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1431928c294a99b…

MALICIOUS

PDF

49.9 KB Created: 2020-08-29 21:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 616c11d3616a97d9e738f1f6604776cd SHA-1: a6747a44c4705ad73fbcf5c58b96c0f866d55ff0 SHA-256: c1431928c294a99b6c98e9a4eda8b6d588382c990fff16eaaad0fbf9f53da3f9
120 Risk Score

Malware Insights

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

The PDF file contains a link farm of numerous PDF files hosted on Shopify, with one specific URL pointing to a known malicious redirector. This suggests a social engineering attack aiming to direct users to malicious infrastructure. The document body contains garbled text and a URL that appears to be the primary lure, likely intended to disguise the malicious intent. 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.me/wix?keyword=skill+150+thi%25E1%25BA%25BFu+l%25C3%25A2m+b%25E1%25BB%2595ng+v%25C3%25B5+l%25C3%25A2m+1
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/3282940602.pdf
    • https://cdn.shopify.com/s/files/1/0437/8574/8642/files/saluf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/jamuvalolepujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3443/files/dna_extraction_lab_activity_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/discord_twitch_webhook.pdf
    • https://cdn.shopify.com/s/files/1/0428/7257/0012/files/aurangabad_voter_list_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/basifi.pdf
    • https://cdn.shopify.com/s/files/1/0445/3544/7711/files/ias_zoology_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/missguided_vietnam_tuyn_dng.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/davezerus.pdf
    • https://cdn.shopify.com/s/files/1/0435/8491/3563/files/xagekimurodurubuxuruwegu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9717/7768/files/51607344829.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/golozoponepojumot.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/68876684382.pdf
    • https://cdn.shopify.com/s/files/1/0428/6123/2294/files/chess_puzzles_mate_in_1.pdf
    • https://cdn.shopify.com/s/files/1/0432/1725/6603/files/82513125127.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4261/files/tepavukozavan.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_off00006b42.bin
796af272aee94fbab2aaa67342fcc911b67a57dc5a3826fabf4cca3a82fab8c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B42 6128 bytes
font_01_sfnt_off00007f2a.bin
fe83efd47db228e1b07fa5e26799cce217e39c61890f4771b26c4be94990acad
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F2A 25728 bytes