Malicious PDF — malware analysis report

Static analysis result for SHA-256 45fae8be8c3c8c84…

MALICIOUS

PDF

102.1 KB Created: 2020-08-27 20:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5456672a0ff7baeb85e8b0490b0bc122 SHA-1: c825e42dc0d8a3709a57a16535809b3b96cead04 SHA-256: 45fae8be8c3c8c843cf5caf70159c85604bcb95698ca5a5a9bd4b8efc870a21c
120 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, specifically a redirector link to a known malicious domain and a large number of external PDF links, suggesting a link farm for SEO manipulation or traffic redirection. The primary malicious URL identified is https://ttraff.ru/pify?keyword=analisis+numerico+espol. While no scripts were extracted, the presence of these indicators strongly suggests the document is designed to lure 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=analisis+numerico+espol
    • http://files.aubreyrosefalk.com/uploads/1/3/2/3/132302928/pivub_pibepuro_naseruk.pdf
    • http://niwase.cincyshawn.com/uploads/1/3/2/6/132682124/1948848.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kerikelamizefebimu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3267/2418/files/accumulator_hydraulic.pdf
    • https://cdn.shopify.com/s/files/1/0433/7516/5594/files/99556397605.pdf
    • https://cdn.shopify.com/s/files/1/0438/9509/5464/files/81779807172.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/dadorowuvonumu.pdf
    • https://cdn.shopify.com/s/files/1/0463/3513/1809/files/3589628822.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/ssc_mathematics_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5366/files/business_plan_powerpoint_presentation.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1284/files/donexefomanege.pdf
    • https://cdn.shopify.com/s/files/1/0465/0211/7528/files/49110740671.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8770/files/abematv_video_helper.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128a3.bin
29b6e61f1b412952b1ada30cfbea93fec1993c1701c0f3d5155b1f45f93113e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128A3 5068 bytes
font_01_sfnt_off0001397f.bin
2621ae85e3060e61d2808ed1c49439c82c1aacb14c690e808a03b7c3c321c95c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1397F 1412 bytes
font_02_sfnt_off00014134.bin
79937a9aceee291025d81962b05903e34ea1935985d24defc57fa68e144784cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14134 15944 bytes
font_03_sfnt_off00017326.bin
b3a04685fef114a653d43745cbfa88e191e6d5b912dd6f901aa82af31c58a385		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17326 16584 bytes

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