Malicious PDF — malware analysis report

Static analysis result for SHA-256 41fb043f0c52b78b…

MALICIOUS

PDF

42.4 KB Created: 2020-08-27 14:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdff3b2a5e2f1da56c2876229e8a515e SHA-1: 603865b0e983ead9b27cc831f5641d4b626608a3 SHA-256: 41fb043f0c52b78bf4fee9ec2a8ac9b06dbf8c05cacde3427077fe4053cb9f99
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF document contains numerous embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a link farm or SEO poisoning tactic to drive traffic to malicious infrastructure. The document body, though heavily corrupted, contains the target URL, reinforcing the malicious redirection attempt. The presence of a malicious redirector link and the sheer volume of outbound links indicate a high likelihood of this PDF being used for malicious redirection, potentially leading to further malware downloads or phishing attempts.

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=2008+jeep+grand+cherokee+factory+service+manual
    • http://files.terraheal.com/uploads/1/3/0/7/130775934/8199264.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1326/files/66396065955.pdf
    • https://cdn.shopify.com/s/files/1/0436/3704/7449/files/41936036908.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/asmaul_husna_99_dan_artinya.pdf
    • https://cdn.shopify.com/s/files/1/0438/9991/2344/files/98042665951.pdf
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/beckett_baseball_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4441/files/auto_sum_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/1845/2120/files/reading_comprehension_worksheets_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6970/files/58796727985.pdf
    • https://cdn.shopify.com/s/files/1/0464/7000/4886/files/goxugopozo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3429/files/tavopidikupevimur.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/kubedajuja.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/46263117682.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/godikuka.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/13596423911.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_off000063a4.bin
b6b2f3e9eb7a826e088233fa4d93ee9a5f9e4edf9eca3ea0d0acdf90aa24055a
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A4 6244 bytes
font_01_sfnt_off000078be.bin
46ae3c1290084cf141b4b6fd9394f796ba1e5a483458096205c6f43f3e3b27c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x78BE 10420 bytes