Malicious PDF — malware analysis report

Static analysis result for SHA-256 9609df0b07080f07…

MALICIOUS

PDF

45.3 KB Created: 2020-08-24 02:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0069b776995a0c5035806b97e9f46aa7 SHA-1: 30c845a31c0ebec67de6e7b6f376a9b2082b3b72 SHA-256: 9609df0b07080f07b5623174e8203d2211f3991a8ba3adad47eeb25e928460a0
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to a URL that appears to be a lure for a CV builder application. The presence of numerous other links, many pointing to Shopify, suggests a link farm or SEO poisoning tactic. 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=aplikasi+buat+cv+di+android
    • http://files.fitintegrity.com/uploads/1/3/0/9/130969151/taxagoxuso.pdf
    • http://files.bysophschnei.com/uploads/1/3/1/3/131380213/gakegiwubasopisadi.pdf
    • http://bigex.crescentandstone.com/uploads/1/3/0/8/130813731/tenilobojosanan.pdf
    • https://cdn.shopify.com/s/files/1/0429/5196/6873/files/amelogenesis_imperfecta_case_report.pdf
    • https://cdn.shopify.com/s/files/1/0440/1692/6870/files/chernobyl_disaster_report.pdf
    • https://cdn.shopify.com/s/files/1/0439/0617/1048/files/9226375427.pdf
    • https://cdn.shopify.com/s/files/1/0437/8296/3361/files/mandarin_chinese_english_bilingual_visual_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2618/files/33653762825.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34597476450.pdf
    • https://cdn.shopify.com/s/files/1/0431/5630/8123/files/32568103020.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/benubojebexoreloruva.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/wasupojiluxelofamiren.pdf
    • https://cdn.shopify.com/s/files/1/0433/8758/4677/files/kurudawuxifep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48975286879.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/53606966730.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/aam_registration_notifier.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_off00007372.bin
6932d50502b38f715e2dcc04ebef1684e9439994127346e4686d72a0d51f2866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7372 5320 bytes
font_01_sfnt_off0000857f.bin
c57649587ca92ce41cc8e34ad65153f96b82ac498bb786487dbd72aecb3386bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x857F 10112 bytes

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