Malicious PDF — malware analysis report

Static analysis result for SHA-256 d35816a0fdad09d7…

MALICIOUS

PDF

38.6 KB Created: 2020-08-22 04:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60894cb56c2b0143ad06a534596ce6d1 SHA-1: 3a98f6ebc48cdc552296192fa3153002fe2fd742 SHA-256: d35816a0fdad09d7bc9a6b2a007ebec2aa4c0d6b355b090e7bb571ac8d242cb8
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.com. It also contains a heuristic for a PDF link farm, with numerous links to Shopify domains, likely for SEO poisoning or to host benign-looking files. The presence of a 'download button' heuristic and the embedded URL in the document body further support a lure-based attack pattern. The primary malicious IOC is the ttraff.com redirector 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.com/pify?keyword=maintenance+technical+report+example
    • http://files.planoeastbasketball.net/uploads/1/3/1/4/131453615/ziparewow.pdf
    • http://files.sluadg.com/uploads/1/3/1/1/131163684/cfef772da9cfb33.pdf
    • https://cdn.shopify.com/s/files/1/0432/7243/7910/files/24714128002.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/ncert_math_book_for_class_10_with_solution.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/wekalixizijapajenefadofa.pdf
    • https://cdn.shopify.com/s/files/1/0433/2381/8139/files/fce_practice_test_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0444/5110/2887/files/grooveshark_play_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/xexaxusavu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9925/0072/files/54788856513.pdf
    • https://cdn.shopify.com/s/files/1/0463/4207/8625/files/5_minute_countdown_timer_video_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/5834/8703/files/pevogarumefupu.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_off0000597d.bin
d5837bc489ea58dca89023e77580e0b300d68c2e228f7fe2e26f22074ee1d39a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x597D 5068 bytes
font_01_sfnt_off00006a8d.bin
d636e429e86bc778075ad448a50e78c45ea23ee3bf9777a0da07922fed3df47f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8D 10324 bytes

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