Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ae3bdc376c4e1a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-18 16:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f8501390c9b24f8e6e074b66df309be SHA-1: 2e2d4e90ecf14b36166f0cbe7e4cc9801050f6fe SHA-256: b9ae3bdc376c4e1a83aeb9f813b41ca18813427672e7de2c66221e801d858b06
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=sheet+pan+baked+chicken+and+veggies'. Additionally, it features a PDF link farm heuristic, indicating a large number of embedded links. The document body, though partially corrupted, contains the same malicious URL and references to benign-looking PDF files hosted on Shopify, suggesting a lure to disguise the malicious redirect. No scripts were extracted from this sample.

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=sheet+pan+baked+chicken+and+veggies
    • http://files.thejoshuaquilt.com/uploads/1/3/1/4/131438003/kegago_zijuruzumezu_xusepijoroxivi_ruziga.pdf
    • http://files.gonzagahealth.com/uploads/1/3/0/7/130775297/3d170.pdf
    • http://files.harperkinetics.com/uploads/1/3/1/4/131453018/pevexajozizapox-pakexizikav-wexivaramolow-nuwudab.pdf
    • http://files.dcpolicefoundation.org/uploads/1/3/1/6/131607522/253146c9e5d7c.pdf
    • http://files.woozeyacressoaps.com/uploads/1/3/1/4/131454090/e1e378028f4.pdf
    • https://cdn.shopify.com/s/files/1/0430/6337/8081/files/56667380924.pdf
    • https://cdn.shopify.com/s/files/1/0430/9195/1769/files/ieee_abstract_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/1654/2632/files/lasuridakozoju.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/furitevixirobexuwatido.pdf
    • https://cdn.shopify.com/s/files/1/0432/8590/5576/files/english_grammar_book_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/6713/8470/files/urinary_catheterization_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2836/files/how_many_meters_in_a_millimeter.pdf
    • https://cdn.shopify.com/s/files/1/0448/6030/9665/files/bridge_to_terabithia_whole_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0111/files/lizarusutuwigasadebifog.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/ditipidafuf.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_off000063d3.bin
bc236e053b4beb6bfffd9a992bdba79acde4d41259f2cc5431c6fbb53a53d3e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 5576 bytes
font_01_sfnt_off000076bf.bin
8d0224cdee56516d2df43168931ad6ccb10eeab81fa60d441ba136cf58c75e98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76BF 10120 bytes

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