Malicious PDF — malware analysis report

Static analysis result for SHA-256 25af793997cc9fdb…

MALICIOUS

PDF

38.8 KB Created: 2020-08-27 22:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5841f7ffe06eae72a9891f6e218c0db7 SHA-1: da096e029116a1ee871dcf97c068f4363cd6757a SHA-256: 25af793997cc9fdb0f8183511d87a36a1df2726ee315bdcbc6bc5345830df139
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple links pointing to Shopify-hosted PDFs and a primary malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the URL for the malicious redirector, suggesting the document's purpose is to drive traffic to this malicious site. The presence of numerous links, many of which are benign, indicates an attempt to manipulate search engine results or distribute malicious links under the guise of legitimate content.

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=ashrae+heat+load+calculation+spreadsheet
    • http://files.oxbowriversnorkeling.com/uploads/1/3/0/7/130739251/bidisu_kuwadapaduju_wajunubu_metiwosa.pdf
    • http://zakabox.extratimeconcierge.com/uploads/1/3/0/7/130775565/fc095a32a7.pdf
    • http://wosunap.elevenbillionpeople.com/uploads/1/3/0/8/130815031/be1f85.pdf
    • http://sokopeva.baseballtrips.net/uploads/1/3/0/8/130814328/labadezawozijeroj.pdf
    • http://jawopog.paramusscholarshipfundshow.org/uploads/1/3/1/4/131454012/785851.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/97890470894.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7483/files/tedogologa.pdf
    • https://cdn.shopify.com/s/files/1/0437/8247/1837/files/stewart_calculus_6e_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/4003/8298/files/69107341417.pdf
    • https://cdn.shopify.com/s/files/1/0460/2249/2319/files/manualidades_faciles_y_originales_para_regalar.pdf
    • https://cdn.shopify.com/s/files/1/0428/1827/3446/files/chamatkar_movie_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8625/0137/files/agile_software_development_methods_review_and_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0433/1310/2998/files/nilenaniperokujave.pdf
    • https://cdn.shopify.com/s/files/1/0431/3592/6434/files/jekulupolisogifi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4138/9720/files/anguttara_nikaya_pali.pdf
    • https://cdn.shopify.com/s/files/1/0434/5289/1298/files/25985413139.pdf
    • https://cdn.shopify.com/s/files/1/0432/4379/8683/files/7th_grade_math_problems_with_answers.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_off00004e45.bin
cfdf59a0cc40cda50b922138463ecaa12fc447e9f282d0131606ef10d6057929
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E45 2868 bytes
font_01_sfnt_off00005878.bin
7d573a420d6e88a050e60df9e2bc829635721985651e9a61843c7d5c8f955cf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5878 5152 bytes
font_02_sfnt_off000069e9.bin
96677a2abd120ddf6108b92cf29fee35d8de0e90677c634730089ec8ee6d1bfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x69E9 9920 bytes