Malicious PDF — malware analysis report

Static analysis result for SHA-256 53cc283e2d2efe9f…

MALICIOUS

PDF

41.6 KB Created: 2020-08-21 05:09:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51f583e1ff624de36c4e250c74d0f7d5 SHA-1: cc84b5df547259ef389837b33c18d36fb96ff278 SHA-256: 53cc283e2d2efe9ff8f7bdbc1024d9445d3c138543c3c2f79fd86a578c5528f7
120 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic firing indicates a PDF redirector link to 'https://ttraff.ru/pify?keyword=edcite+answer+key+geometry', which is known malicious infrastructure. The document body contains garbled text but also includes the same URL and several Shopify URLs, suggesting a lure to download further malicious content or redirect to phishing sites.

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.ru/pify?keyword=edcite+answer+key+geometry
    • http://lurigazi.threadsofmeaning.com/uploads/1/3/1/4/131437812/9b14556.pdf
    • http://files.littledownhamchurch.org/uploads/1/3/2/7/132712358/2bcb36ea0895b9a.pdf
    • http://files.earthmetaldetecting.com/uploads/1/3/1/3/131383486/0aa6096dc92d1.pdf
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/57542485303.pdf
    • https://cdn.shopify.com/s/files/1/0436/7237/1350/files/jejobixenon.pdf
    • https://cdn.shopify.com/s/files/1/0438/6055/7984/files/34099641173.pdf
    • https://cdn.shopify.com/s/files/1/0428/4507/7671/files/basics_of_civil_engineering_book.pdf
    • https://cdn.shopify.com/s/files/1/0427/9743/2999/files/bubble_sheet_download.pdf
    • https://cdn.shopify.com/s/files/1/0461/8066/3450/files/baasha_digital_hd_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/87280367115.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/gavetiza.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/cisco_ccna_voice_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/18782237403.pdf
    • https://cdn.shopify.com/s/files/1/0439/3022/2747/files/bebobaferisofawokozinikat.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_off00005b07.bin
56b9c7d3781a4b4ac1a5f2225226909a7a3dedd4ef3d8cf02b2e1b81d8f7ad74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B07 5444 bytes
font_01_sfnt_off00006d84.bin
9770e1dee9778f299397ec6d31adef53e34e661d24fe5874264c788751cdd747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D84 13872 bytes

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