Malicious PDF — malware analysis report

Static analysis result for SHA-256 d139ac6faf80f417…

MALICIOUS

PDF

44.4 KB Created: 2020-08-07 03:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9506cc6d667325370dab0dbaf7e49ee0 SHA-1: eff4e0e75437d1da2cd6cfe8b743c8aec11c792a SHA-256: d139ac6faf80f417380624731860adb32eb6ce834dc773d45aa9fbb0fc78631a
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a PDF link farm. The primary malicious URL, 'https://ttraff.ru/pify?keyword=carcinoma+basocelular+infiltrante+pdf', is flagged as a known malicious redirector. The document body, though partially corrupted, contains text related to 'carcinoma basocelular infiltrante pdf' and metadata indicating it was generated by wkhtmltopdf, suggesting a lure to entice users to click on the numerous links.

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=carcinoma+basocelular+infiltrante+pdf
    • http://files.oceancountyroofing.org/uploads/1/3/2/3/132302870/zudotabax-jejopuzivebe.pdf
    • http://files.maltiel.com/uploads/1/3/0/8/130813781/navapudel.pdf
    • http://wonekis.bcwas.org/uploads/1/3/1/4/131454065/ruledugas-xogutakitozite-rosebu-kekerimobuvog.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/zurim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.pdf
    • https://cdn.shopify.com/s/files/1/0430/8100/7255/files/20278500442.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/mulanusebaroto.pdf
    • https://cdn.shopify.com/s/files/1/0435/0597/5462/files/cetoacidosis_diabetica_gpc.pdf
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/1155985658.pdf
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/raritexarosojajitu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/kavujesolovubowive.pdf
    • https://cdn.shopify.com/s/files/1/0430/7025/9357/files/68904682930.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/bayanat_tariq_jameel_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0081/4998/files/36672430648.pdf
    • https://cdn.shopify.com/s/files/1/0427/8134/3900/files/magedigitosemaro.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_off00007032.bin
05bd591650afb97550fb69cbbd701aa9c798467f4f59f2439f1432c94d35c7b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7032 5344 bytes
font_01_sfnt_off0000823e.bin
4753def58a426cd0b85ba4f2bdf1840992f54d658c990f5fea6170026768c5d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x823E 10016 bytes

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