Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e27f998cc2c9adb…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 04:38:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 015e1957a390ebaf6933790f308b6fa7 SHA-1: 9696978bf5832c7596c8e0b1a620be8d146d889c SHA-256: 8e27f998cc2c9adb3be75bd705b368ec3e9a7d76bee89f2de62a1813576c6544
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.com/pify?keyword=minecraft+map+s+windows+10`. This link is presented within the document's body, disguised as a Minecraft map download. The PDF also contains a link farm heuristic, indicating a large number of external links, many hosted on `cdn.shopify.com`. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be directing the user to a malicious site via the embedded link.

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.com/pify?keyword=minecraft+map+s+windows+10
    • http://files.achievect.com/uploads/1/3/0/8/130813528/b5ee27be353223.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/13864476636.pdf
    • https://cdn.shopify.com/s/files/1/0429/3997/3788/files/10936365878.pdf
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/34408942535.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/91726670687.pdf
    • https://cdn.shopify.com/s/files/1/0437/4446/0951/files/11055764642.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/kabigododudu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3117/4039/files/50626250839.pdf
    • https://cdn.shopify.com/s/files/1/0430/8857/6661/files/wibupevekina.pdf
    • https://cdn.shopify.com/s/files/1/0435/5879/7471/files/25835219563.pdf
    • https://cdn.shopify.com/s/files/1/0429/8165/4687/files/alvida_alvida_noha_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3882/files/37584745316.pdf
    • https://cdn.shopify.com/s/files/1/0437/6713/6408/files/gefazabazofudivaveleriba.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/jimogorutatikopezisufolar.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_off00006288.bin
b51f98bdb8408d2d6539bf10c6a553530cad47675ad7ba83ae94b756b523aa58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6288 5560 bytes
font_01_sfnt_off00007564.bin
2b207da8653a9b4d3ff10968f837b5dc9f3a2455f5ccadfa62713f0ad9520753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7564 10396 bytes

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