Malicious PDF — malware analysis report

Static analysis result for SHA-256 3870315d69d36122…

MALICIOUS

PDF

42.4 KB Created: 2020-08-15 00:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 753c67daec2136ad1248ea73784c61c6 SHA-1: 75300b0aa34c11c9ed2f26b18784311ca97bf6c8 SHA-256: 3870315d69d3612281d94c39b4b9a7d25454a7aa106cb29525ab8cdef3b7349b
120 Risk Score

Malware Insights

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

The PDF file was flagged for containing a malicious redirector link and a large number of external PDF links, indicating a link farm or SEO manipulation tactic. The primary malicious URL points to a redirector, likely serving as a gateway to further malicious content. The document body contains garbled text and the authoring application suggests it was generated programmatically, consistent with automated PDF generation for SEO or malicious purposes.

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=transforma%25C3%25A7%25C3%25A3o+isot%25C3%25A9rmica+isob%25C3%25A1rica+e+isot%25C3%25A9rmica
    • http://files.upcross.us/uploads/1/3/2/6/132680905/8427908.pdf
    • http://lejotu.hope-on-the-hill.org/uploads/1/3/2/3/132302995/jiporoxo_fijejelowoze.pdf
    • http://betefulat.medicalimagingindia.com/uploads/1/3/2/7/132740328/5378915.pdf
    • https://cdn.shopify.com/s/files/1/0440/6480/0918/files/mofufupurozafimokififo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/35144536730.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/graphing_linear_equations_worksheet_algebra_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0079/1191/files/the_fall_albert_camus_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3287/0037/files/panulibawamaxetofoxoko.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7384/files/dupajenumovavafefuwej.pdf
    • https://cdn.shopify.com/s/files/1/0432/0513/2456/files/88099659376.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/zerelonomegejodawosaxumos.pdf
    • https://cdn.shopify.com/s/files/1/0431/3507/4465/files/return_to_life_book.pdf
    • https://cdn.shopify.com/s/files/1/0440/5002/2550/files/repokowalelipawax.pdf
    • https://cdn.shopify.com/s/files/1/0440/2790/4165/files/critical_thinking_activities_in_patterns_imagery_logic_secondary.pdf
    • https://cdn.shopify.com/s/files/1/0427/7708/4070/files/gusezamupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/9358/9142/files/vagorururamefive.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_off00006101.bin
976bb2ac7bbb27bab5564cf13570559188c35752996fa8a29bd01f14c09e72b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6101 5960 bytes
font_01_sfnt_off00007360.bin
9949945166e8a9265c7fc9b847e9f358558c56fbf94784abba74b99a96b1e7aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x7360 12644 bytes