Malicious PDF — malware analysis report

Static analysis result for SHA-256 86345435a172fb28…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 23:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba7d6c0d8b72007178de8e43c05052a9 SHA-1: a1aeb04827dea5767ed29eaa0632613186dec7f2 SHA-256: 86345435a172fb287b23ea10174b895b0397b5dda06e871d506dc3810ac7475d
150 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One prominent link, https://ttraff.ru/pify?keyword=chrome++64+bit+windows+8, is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to Chrome and Windows, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=chrome++64+bit+windows+8
    • http://files.candicechristie.co.za/uploads/1/3/0/7/130775347/4740321.pdf
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/57445399277.pdf
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/rusajifojopivisunifokepin.pdf
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/current_police_reports_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0445/2355/2927/files/value_proposition_canvas_strategyzer.pdf
    • https://cdn.shopify.com/s/files/1/0432/2131/9837/files/bupebirimidolezubivub.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/720p_stream_nfl.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/tofabigebibodefifasigikuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/5833/9735/files/28216982448.pdf
    • https://cdn.shopify.com/s/files/1/0437/8473/2829/files/exponential_inequalities_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/4393/0791/files/golavujad.pdf
    • https://cdn.shopify.com/s/files/1/0430/9365/5716/files/insuficiencia_cardiaca_congestiva_diagnostico_diferencial.pdf
    • https://cdn.shopify.com/s/files/1/0436/0346/0259/files/71814228162.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/92733602208.pdf
    • https://cdn.shopify.com/s/files/1/0427/8580/0358/files/lalufitesodibudox.pdf
    • https://cdn.shopify.com/s/files/1/0434/9224/5666/files/wekolaxotasulivowegevu.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_off0000626c.bin
4b57fbb4435d3aac63d57d98798bac71672cfcd44c4a4fa57b0f3820a633d068
pdf-font-stream PDF embedded font (sfnt) at offset 0x626C 5396 bytes
font_01_sfnt_off000074b4.bin
ad6021c6cf1e91c32ea1b8d67c6959681f691779e2463aa2f6e5022d1fbaf071
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 10896 bytes