Malicious PDF — malware analysis report

Static analysis result for SHA-256 53840d25c93e7a6f…

MALICIOUS

PDF

49.1 KB Created: 2020-08-21 03:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6ef28656d327357caf61f9fff962b0f3 SHA-1: 521ca277adc492eded48e1402c524160dba93469 SHA-256: 53840d25c93e7a6f02444fdd84a5e183473cc1250ab234d9e205ece7e58742c7
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic to distribute malicious content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=healthy+relationship+boundaries+worksheets', indicating an attempt to lure users to this malicious site under the guise of a document about relationship boundaries.

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=healthy+relationship+boundaries+worksheets
    • http://files.whytherat.com/uploads/1/3/1/6/131636625/9951.pdf
    • http://files.thewrightauthor.com/uploads/1/3/1/3/131383602/4123506.pdf
    • https://cdn.shopify.com/s/files/1/0432/0172/4580/files/1114759497.pdf
    • https://cdn.shopify.com/s/files/1/0460/1413/6487/files/awaiting_your_reply_formal_letter.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/85634669783.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/48966495183.pdf
    • https://cdn.shopify.com/s/files/1/0438/5089/1424/files/bsria_report_structured_cabling.pdf
    • https://cdn.shopify.com/s/files/1/0439/7131/3822/files/renivorujogipijokareluvas.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/bluebird_promise_all.pdf
    • https://cdn.shopify.com/s/files/1/0437/2276/8538/files/75591719292.pdf
    • https://cdn.shopify.com/s/files/1/0428/6047/8630/files/skull_pill_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1417/files/sq11_mini_dv_camera_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4831/files/tamil_alphabet_chart_with_english_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0433/0546/8068/files/2418426688.pdf
    • https://cdn.shopify.com/s/files/1/0454/6904/0790/files/biochemistry_short_answer_questions.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_off0000743f.bin
7ef90ef91fdb107b542ffb9f6b8897beb06c4a49c10192095aa1132f62bc2f3d
pdf-font-stream PDF embedded font (sfnt) at offset 0x743F 5288 bytes
font_01_sfnt_off00008634.bin
2a320923e17f614c5e71411ea31668d2ae781d50b3378869bdb1b2b64e6f4846
pdf-font-stream PDF embedded font (sfnt) at offset 0x8634 10272 bytes
font_02_sfnt_off0000a938.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xA938 4324 bytes