Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce66b636f0022eb…

MALICIOUS

PDF

41.8 KB Created: 2020-08-18 21:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85532dc372b9104f75e4c95b0ed36193 SHA-1: f9702ff903c087818052a98f6e46fc5a6e741f48 SHA-256: bce66b636f0022eb3c1fb1eee71d3cdcd88f80c5f584e063e615f8fc491b50d5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, with the primary heuristic indicating a malicious redirector. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=azur+lane+apkpure', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other Shopify URLs, suggesting a link farm or lure for users. The presence of multiple Shopify links, some of which are identified as benign, alongside the malicious redirector, indicates a social engineering tactic to drive traffic to malicious infrastructure.

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=azur+lane+apkpure
    • http://files.apologeticsdiscipleship.com/uploads/1/3/1/6/131606984/0e8692.pdf
    • http://files.acaccentsjewelry.com/uploads/1/3/0/8/130873741/gajari.pdf
    • http://buxinewi.the8thavenue.com/uploads/1/3/1/3/131384169/1612037.pdf
    • http://files.kellykadera.com/uploads/1/3/0/8/130814124/8593658.pdf
    • https://cdn.shopify.com/s/files/1/0434/1805/8901/files/basic_english_grammar_teacher_s_guide_betty_azar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0473/1300/files/5949012465.pdf
    • https://cdn.shopify.com/s/files/1/0438/8922/9979/files/46756050924.pdf
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/43240076190.pdf
    • https://cdn.shopify.com/s/files/1/0430/8267/8433/files/30038866085.pdf
    • https://cdn.shopify.com/s/files/1/0431/5581/6608/files/derren_brown.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/befiguzuzume.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/anjathe_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6189/5587/files/7756610260.pdf
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/fefojezoxali.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_off00005263.bin
852b759d0561c037a8c1cdbd4f5a6025c065923f0b0f803843f0fc6247ed1544		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5263 4740 bytes
font_01_sfnt_off00006296.bin
7d74e15f268555c35dbd596f228402e0c39d84de1460877ce487d35cd73721ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6296 10088 bytes
font_02_sfnt_off00008556.bin
cacce353daa52449aaa2dc03ff14e12d7f37b8e2e541d6bae97b449db5f5a003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8556 16248 bytes

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