Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b640f59c9d2e19…

MALICIOUS

PDF

56.1 KB Created: 2020-08-09 19:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83be164b6275e58d59a7dfd61258f5c8 SHA-1: 356550a93bec3825ae37d6415f32e76641460f80 SHA-256: 38b640f59c9d2e19e3831825273fc73c31dbf4765b39b019b17b69de557f7294
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=mercado+internacional+definicion+pdf', suggesting a lure to a malicious site. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or manipulate search engine results.

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=mercado+internacional+definicion+pdf
    • http://files.joshuaproject.community/uploads/1/3/0/7/130776775/9885152.pdf
    • http://files.stjhollandfaith.org/uploads/1/3/0/7/130740033/3637342.pdf
    • http://files.stevenpitman.com/uploads/1/3/1/6/131606349/138c2515.pdf
    • https://cdn.shopify.com/s/files/1/0434/0639/3496/files/zagobufeveganuxeralaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/jegitetawaxelum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48177964882.pdf
    • https://cdn.shopify.com/s/files/1/0429/9672/7957/files/welerixiwofuj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/57939943613.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8059/files/temavoretixaruj.pdf
    • https://cdn.shopify.com/s/files/1/0437/6988/8920/files/41354030548.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32732230761.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/dujudukobumiralere.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/quarterly_report_template.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_off00009cae.bin
eedfd401ec09fb81858adf09b1c1ebcca177ca62a51b2d1613ab7ea75a1dc15c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CAE 4976 bytes
font_01_sfnt_off0000adb7.bin
38f716ff5c8387ca8f7c846975f50a7bcf30e031fa561d2f411077403266e1d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADB7 11164 bytes

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