Malicious PDF — malware analysis report

Static analysis result for SHA-256 b54e0a6f174a976e…

MALICIOUS

PDF

46.0 KB Created: 2020-08-10 20:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53f37a91b1a46e9266a0d648681da9b8 SHA-1: f843dc1266b1326a3f33742f1c0392c5e3a1f6a2 SHA-256: b54e0a6f174a976e3ee414d25ba5f4ddcaa46551d348da8c064fdd04510067cf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=caries+dental+infantil+pdf'. Additionally, another critical heuristic indicates a PDF link farm, with many links pointing to benign Shopify URLs but likely serving as a distraction or SEO manipulation. The document body contains obfuscated text and the malicious URL, suggesting the primary intent is to redirect the user to a harmful site. No scripts were extracted from this sample.

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.cc/pify?keyword=caries+dental+infantil+pdf
    • http://files.tasmanianpioneers.com/uploads/1/3/1/4/131411596/a46df5.pdf
    • http://files.skydivevoss.no/uploads/1/3/1/3/131379134/kaxuroworif.pdf
    • http://savam.ooh-la-lafrenchies.com/uploads/1/3/1/3/131380005/fe5ed633.pdf
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/4685793436.pdf
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/english_course_for_spanish_speakers.pdf
    • https://cdn.shopify.com/s/files/1/0428/8941/2764/files/tsc_appraisal_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/3794/0117/files/centurylink_c3000z_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/81765167708.pdf
    • https://cdn.shopify.com/s/files/1/0447/8812/1760/files/soxigomujeborozufurulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/74852783192.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/dnd_5e_grick.pdf
    • https://cdn.shopify.com/s/files/1/0434/1520/8098/files/zizafufadasixi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4335/6821/files/geseturaferup.pdf
    • https://cdn.shopify.com/s/files/1/0436/1617/4237/files/java_sort_string.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/dujemisopibidofugirig.pdf
    • https://cdn.shopify.com/s/files/1/0429/2699/7663/files/36212451602.pdf
    • https://cdn.shopify.com/s/files/1/0431/1770/7413/files/livro_liberalismo.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/
    • https://cdn.shopify.com/s/files/1/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075e1.bin
328ba864393399cb1467927186f8d5f840ec2a08d74de55224bba3ef0df175ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x75E1 4940 bytes
font_01_sfnt_off000086b7.bin
adcdb76df264e966e57c390f9796c9e2c1973db71a233c387df42d0d3a7c10db
pdf-font-stream PDF embedded font (sfnt) at offset 0x86B7 10764 bytes