Malicious PDF — malware analysis report

Static analysis result for SHA-256 d849d9bcff3c0ae9…

MALICIOUS

PDF

39.7 KB Created: 2020-08-21 17:28:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5ca74aca9148fa65603a2e8adcf87cb SHA-1: 35bc94717ba7b537bb74bc321e1356416e07fc3b SHA-256: d849d9bcff3c0ae917cc114e9273fddf7f434ac517d8d284bb98f4283c311867
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, indicating a link farm designed to distribute malicious content. The document body, though partially corrupted, contains text related to 'unlock bootloader samsung apk' and a call-to-action phrase, suggesting a social engineering lure. The primary malicious URL identified is ttraff.ru, which is known for redirecting to potentially harmful content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=unlock+bootloader+samsung+apk
    • http://files.lhartcreations.com/uploads/1/3/0/7/130776599/d824a33c6e.pdf
    • http://vexomasuw.sanabriaphotography.com/uploads/1/3/2/8/132814930/6844695.pdf
    • http://files.race4rescues.com/uploads/1/3/0/9/130969884/xavipipaligube-modituvixereni-wogupubi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7529/5640/files/708_296_4502.pdf
    • https://cdn.shopify.com/s/files/1/0431/2026/3322/files/25983040691.pdf
    • https://cdn.shopify.com/s/files/1/0433/0065/1158/files/larotokuwejomoguzexetodar.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/g_eazy_random_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5041/files/58775099545.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/muposaliwovojegomezo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/arabic_language_words.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_off00005c5b.bin
6fbe112776da11f20c7abaf3659307672af0240457ac8f974e5969c0f3fe07be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5B 5588 bytes
font_01_sfnt_off00006f3c.bin
dc53ef5ca306de274993fc9685b4fe6bbfbce82400973821a2a7bbd8b4823ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3C 10376 bytes

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