Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16d6f64f32eb264…

MALICIOUS

PDF

47.4 KB Created: 2020-07-31 05:17:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e7e1f557681b96810bb12517236ebce SHA-1: c0442dfaef802a7a961f4d29bc475df83b1c4cdf SHA-256: b16d6f64f32eb264ca1ce9cb3af14c74a91f119d976fbf40fb94aeebf31f8fec
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a 'PDF link farm'. One of these links, 'https://ttraff.cc/pify?keyword=cancer+de+cervix+y+embarazo+pdf', is flagged as a malicious redirector. The document body is heavily obfuscated, preventing a clear understanding of its intended lure, but the presence of the link farm and malicious redirector strongly suggests an attempt to drive traffic to malicious sites.

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.cc/pify?keyword=cancer+de+cervix+y+embarazo+pdf
    • http://files.whistlingwingshrc.com/uploads/1/3/0/7/130775021/jidivafipe.pdf
    • http://files.ayurvedabarcelona.eu/uploads/1/3/1/4/131408169/muxoxu.pdf
    • http://files.nextmanager.net/uploads/1/3/2/3/132302780/f006aa8.pdf
    • http://files.zanyunoodles.com/uploads/1/3/0/7/130739381/sikete-wemotuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5502/files/67082715619.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/73818092856.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/8374852423.pdf
    • https://cdn.shopify.com/s/files/1/0428/5746/3964/files/katonativa.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/jozojibos.pdf
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/vobejewifijisugubanafo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2208/files/82657639005.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/sovapigute.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4385/files/98072149272.pdf
    • https://cdn.shopify.com/s/files/1/0440/8741/0840/files/woroxiwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pigagijewunafusigiku.pdf
    • https://cdn.shopify.com/s/files/1/0433/5891/2662/files/45169653221.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://medlineplus.gov/spanish/cervicalcancer.html
    • 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_off00007859.bin
7d95b15a6a266a588d236377df97944e1184fcdc2a7c8f2b11ec38a8eeaff7b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7859 5240 bytes
font_01_sfnt_off00008a23.bin
b678e414613e339ec602207d5e8725d484e01751c9779e52fa566d8accf58c13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A23 11072 bytes

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