Malicious PDF — malware analysis report

Static analysis result for SHA-256 b817a2c4fc2e51b4…

MALICIOUS

PDF

48.5 KB Created: 2020-08-19 21:43:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54d20fda48f609efcac00b29b9c93d9d SHA-1: 4db8b31044e373f52e21a8b2a20bd54e57c44c85 SHA-256: b817a2c4fc2e51b4e23f55e1e037dd6ddb857645180a13639ea60bc93b36c9b5
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious link, 'https://ttraff.com/pify?keyword=davis+drug+guide+diphenhydramine', is flagged as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a social engineering lure to a malicious site. No scripts were extracted, limiting the analysis to the link-based redirection and SEO spamming techniques.

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.com/pify?keyword=davis+drug+guide+diphenhydramine
    • http://files.msbrodysclass.org/uploads/1/3/1/3/131398406/4103915.pdf
    • http://files.redbird-designs.net/uploads/1/3/2/6/132682585/bunifonudewezozige.pdf
    • http://gabizafix.techniquevaulting.net/uploads/1/3/0/7/130738799/1a5cd.pdf
    • https://cdn.shopify.com/s/files/1/0433/7103/6823/files/general_characteristics_of_fungi_notes.pdf
    • https://cdn.shopify.com/s/files/1/0438/1150/4288/files/decimal_fraction_place_value_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/wobomitubezawuxi.pdf
    • https://cdn.shopify.com/s/files/1/0440/0198/4662/files/wonderful_tonight_lyrics_and_chords.pdf
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/vegisomerugunuparopuve.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/gadoxapajabazogixogobo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/50239297953.pdf
    • https://cdn.shopify.com/s/files/1/0448/6584/7458/files/ielts_writing_task_1_sample_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/3323/9457/files/ulcerative_colitis_diet_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/gexowupizoligukikidot.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/english_club_activities_for_college_students.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1974/files/authorized_economic_operator_aeo_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0432/0745/8975/files/43801425013.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_off00007f8b.bin
04cc278af4982ebf278e0299f8a0026d18aef3ebb4c797f2e7359a719bc332b1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8B 5504 bytes
font_01_sfnt_off00009221.bin
1470f0115e96d83a318dab88c83dae70e6b90782c665b6f14b6ef6b2b7244d4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9221 10304 bytes