Malicious PDF — malware analysis report

Static analysis result for SHA-256 f627bebd8bd14ffc…

MALICIOUS

PDF

48.6 KB Created: 2020-08-08 05:55:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 611a45cd6d11ede35cc4717596b38df7 SHA-1: 42ca6d3ec281b3ac66320c21fb4331cb2dc85ae3 SHA-256: f627bebd8bd14ffc13cc33a85ac4547cf17a83c8210e19bf9e388a769eaa45c0
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, specifically pointing to 'https://ttraff.ru/pify?keyword=basic+ms+office+course+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'basic ms office course pdf', suggesting a lure for users seeking educational material. The primary attack pattern involves redirecting users to malicious infrastructure.

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=basic+ms+office+course+pdf
    • http://files.theartofalainponcelet.com/uploads/1/3/2/7/132741169/9636384.pdf
    • http://zasotex.mgle-germanschool.org/uploads/1/3/2/8/132816066/178335.pdf
    • http://files.abautodetailing.com/uploads/1/3/1/3/131383838/3776722.pdf
    • http://gowofi.beautyandbreakdowns.com/uploads/1/3/1/3/131384771/e884256c8d7f.pdf
    • http://bevub.artfeedshunger.co/uploads/1/3/2/7/132712207/jiraba.pdf
    • https://cdn.shopify.com/s/files/1/0439/3736/6174/files/axar_publication_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/9419/5870/files/88173805096.pdf
    • https://cdn.shopify.com/s/files/1/0433/4583/8248/files/yield_point_phenomenon.pdf
    • https://cdn.shopify.com/s/files/1/0433/1392/2206/files/rexawijowep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67768868558.pdf
    • https://cdn.shopify.com/s/files/1/0428/5464/5916/files/misaladajuxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/gusufuregatino.pdf
    • https://cdn.shopify.com/s/files/1/0438/0029/7633/files/fewazunutigexotetefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0643/5232/files/19903667552.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/pc_me_file_kaise_banaye.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/79408003833.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
stream_003_off00006e2f.bin
0b11bb05da5b84503e0b6755f0bd24f2a84ec7a69bf76000785a148e77799765
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6E2F 5284 bytes
font_01_sfnt_off00008086.bin
ec11291e3a029bad21285ce6e30745590943d0f951f26fc9da7f334d93b0f325
pdf-font-stream PDF embedded font (sfnt) at offset 0x8086 5320 bytes
font_02_sfnt_off00009287.bin
21848d04cf8507cb18998a175fb40041b5aa2435dc641af732a4a0a1b62eeca9
pdf-font-stream PDF embedded font (sfnt) at offset 0x9287 10280 bytes