Malicious PDF — malware analysis report

Static analysis result for SHA-256 c61388e4916a88b5…

MALICIOUS

PDF

42.3 KB Created: 2020-08-06 13:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c5ebf292941fbf4077a640e15453e5f SHA-1: 332d444c2d56cd6d0bde0b697a10b705ed24664f SHA-256: c61388e4916a88b557193ad000a188f02ebd5128c23231a8f175b02dd2f2349a
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on ttraff.com. This heuristic, combined with the PDF_MALICIOUS_REDIRECTOR_LINK firing, indicates a strong likelihood of malicious redirection. The document body itself is largely unreadable binary data, but the presence of the URL 'https://ttraff.com/pify?keyword=detailed+structure+of+a+plant+cell+pdf' suggests a lure related to academic content to entice clicks. No scripts were extracted from this sample.

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=detailed+structure+of+a+plant+cell+pdf
    • http://files.jonkammerman.com/uploads/1/3/0/7/130739269/8d06b7a.pdf
    • http://files.hancockcountyfoodpantry.org/uploads/1/3/2/6/132696274/pewax.pdf
    • http://files.daydreaminginafrica.com/uploads/1/3/2/7/132712323/konalubafep.pdf
    • http://files.imtawexford.com/uploads/1/3/0/8/130874631/vamamejusifivu-mimud-pofarazur.pdf
    • http://benelesof.bethereiki.com/uploads/1/3/2/6/132682989/119d0132d85629.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/71973826532.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pedarivorenali.pdf
    • https://cdn.shopify.com/s/files/1/0435/5401/3336/files/54155002438.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/mawegapofamelevevafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6098/files/82918313541.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/tarovimizofurupis.pdf
    • https://cdn.shopify.com/s/files/1/0434/2549/7239/files/73294638280.pdf
    • https://cdn.shopify.com/s/files/1/0435/9441/6290/files/hygromanteia.pdf
    • https://cdn.shopify.com/s/files/1/0431/8380/0474/files/mechanics_of_materials_beer.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/11559042967.pdf
    • https://cdn.shopify.com/s/files/1/0441/3957/7496/files/sebepanerugegu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4373/4172/files/73130259769.pdf
    • https://cdn.shopify.com/s/files/1/0430/5122/1146/files/pefipezifa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/xezobuvuz.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8541/files/zofavotawaxafarubep.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_off00006480.bin
d7244102eedfee3b395bfbadd98c9a8498be95a0de05dc04be802108d4e69bb2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6480 5148 bytes
font_01_sfnt_off00007620.bin
47ea5e4e47b091a3a280a48308e19c33b79cb3bdf1aa68a655565942cd7f3a19
pdf-font-stream PDF embedded font (sfnt) at offset 0x7620 11156 bytes