Malicious PDF — malware analysis report

Static analysis result for SHA-256 e205bf6b41ec93d3…

MALICIOUS

PDF

43.8 KB Created: 2020-08-10 04:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 79972ffd9212b3074613719cc94f2779 SHA-1: 3824452814ad732955b74c5ab50faeb4fc0c9a5f SHA-256: e205bf6b41ec93d3856ffbc3c5f1372ea65c9f51099d894e71830989ff40eae5
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The primary malicious URL, https://ttraff.ru/pify?keyword=calendar+aptitude+questions+with+solution+pdf, is likely used to lure victims to a malicious site. The document body, though heavily obfuscated, contains references to the malicious URL and other embedded links, suggesting a link farm or redirection tactic.

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=calendar+aptitude+questions+with+solution+pdf
    • http://files.huntersvillepres.org/uploads/1/3/1/4/131438443/1924aa32565007.pdf
    • http://files.simulacrasays.com/uploads/1/3/1/8/131857315/7621412.pdf
    • http://files.ashiharakaratesg.com/uploads/1/3/2/6/132681660/wutugofetoku.pdf
    • http://files.capecurbappeal.com/uploads/1/3/1/1/131163851/2348521.pdf
    • http://files.erinmerrill.studio/uploads/1/3/1/3/131383514/89887.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/41535193570.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dijovosulodomozov.pdf
    • https://cdn.shopify.com/s/files/1/0433/8922/3066/files/wowupiligumusapoditera.pdf
    • https://cdn.shopify.com/s/files/1/0433/0219/1269/files/zupatejizokefaxanujap.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/cfa_level_1_ethics_practice_questions.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/fimonikowodenuruxaneju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0432/4530/6011/files/raduzas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3042/9352/files/54545183548.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/kiwisolezezajebu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0024/1061/files/budgeting_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0430/1747/0101/files/lufudoravut.pdf
    • https://cdn.shopify.com/s/files/1/0440/3609/6150/files/tujanigepulevef.pdf
    • https://cdn.shopify.com/s/files/1/0432/2902/0317/files/73645512994.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.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_off00006dbf.bin
c81541322850a3bddb213be706bb526aba85f39087ac339eaa8e5ded48975608
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBF 5252 bytes
font_01_sfnt_off00007f9e.bin
67ab1c213b709412ddef010a5024a8f44091adf5cfacaaf95f557d6d3c1422f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F9E 10012 bytes