Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9f1c0274c10b1b6…

MALICIOUS

PDF

38.1 KB Created: 2020-08-21 08:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d346cf541d2e24324fa2aefdf2460c6 SHA-1: a58d44e59e1c84cbbc54b8e4cc61a8de635c6224 SHA-256: d9f1c0274c10b1b60db68406a977192ee52fd743da398b49766207c21e6220f8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.ru. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'budget line equation pdf'. The presence of a mass external PDF link farm further indicates malicious intent, likely to distribute further payloads or engage in SEO manipulation for malicious purposes. No scripts were extracted from this sample.

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=budget+line+equation+pdf
    • http://files.yorketrust.org/uploads/1/3/1/8/131856086/jixotafebu-vojalibapudi.pdf
    • http://files.dehoniansocialjustice.org/uploads/1/3/1/4/131407274/nonawebir.pdf
    • https://cdn.shopify.com/s/files/1/0455/6220/0229/files/monthly_calendar_template_december_2018.pdf
    • https://cdn.shopify.com/s/files/1/0431/7023/4527/files/ncert_maths_book_class_5_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7382/2115/files/basic_teachings_of_christianity.pdf
    • https://cdn.shopify.com/s/files/1/0448/0348/9954/files/the_bro_code_barney_stinson.pdf
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/84804273768.pdf
    • https://cdn.shopify.com/s/files/1/0429/6884/2393/files/xajoli.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/madodejub.pdf
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/jurituzilowalisopateliki.pdf
    • https://cdn.shopify.com/s/files/1/0434/2684/0737/files/sepekigiredog.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/70214571095.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_off00005998.bin
cec9cea737294370fbac31a97564d02ae2684f74174c23735498264331bc74cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5998 5108 bytes
font_01_sfnt_off00006b0d.bin
43a302e40ed7eb27dddc71a015960f84cf2a2de11b1a8b535321cc3870fe7643		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0D 9688 bytes

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