Malicious PDF — malware analysis report

Static analysis result for SHA-256 a099a989b9f3cc2f…

MALICIOUS

PDF

40.2 KB Created: 2020-08-12 12:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 076005185dd7c3e45c426ca12fcd0698 SHA-1: a285d676e677cb8abafd779f8384a681256964bb SHA-256: a099a989b9f3cc2f5b061a140a2bfbc15723be9710e5180564d12f1456afd67c
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on Shopify, which is indicative of a link farm or SEO poisoning attempt. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is the primary indicator of malicious intent. The document body contains garbled text but includes the target URL, suggesting the PDF's purpose is to drive traffic to this malicious site. No scripts were extracted, but the PDF structure and link farm heuristics strongly suggest a malicious redirection attack.

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.cc/pify?keyword=cvcc+word+list+pdf
    • http://files.edwardfanphotos.com/uploads/1/3/0/7/130740069/wojixejegi.pdf
    • http://dakel.connectorofpeople.com/uploads/1/3/0/7/130738524/aecf3517a43106.pdf
    • http://sexavaj.southwestpaddlecompany.com/uploads/1/3/2/6/132681488/muzovobo.pdf
    • http://files.poetweaver.com/uploads/1/3/1/6/131606494/wumumofoxobuna.pdf
    • http://files.meridianbodycare.com/uploads/1/3/1/8/131857193/6976761.pdf
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/viliporixuwite.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/32263726027.pdf
    • https://cdn.shopify.com/s/files/1/0428/8797/0975/files/vusifufuzo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/18103569813.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/32357725611.pdf
    • https://cdn.shopify.com/s/files/1/0433/4157/8405/files/46866698509.pdf
    • https://cdn.shopify.com/s/files/1/0428/7853/3788/files/97190843562.pdf
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/37000809444.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/bizitufujarufelebanak.pdf
    • https://cdn.shopify.com/s/files/1/0438/4358/4162/files/geguzumivaforufusimebuja.pdf
    • https://cdn.shopify.com/s/files/1/0432/8688/8601/files/nogirigizesozigawaja.pdf
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/jaweluruvubif.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/wutanuxapipevedug.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8280/files/avogadro_s_law_problems.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_off00005f71.bin
5a56f75ec37c0f8c3ffc54329137b23397e5e498cc40043db8af33958733e4f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F71 4996 bytes
font_01_sfnt_off00007095.bin
e1479f31e9e953ce0ffde1992e6bd99c4495d0f2be0322422a6a18388efa8fa4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7095 10276 bytes