Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffec3230f5ffd11a…

MALICIOUS

PDF

48.5 KB Created: 2020-07-30 23:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67109cff8bad829a50411009143e2617 SHA-1: 2533a1f6ae710db668ae35435885a9487d6d7f74 SHA-256: ffec3230f5ffd11a8d71436e989c35f75c64a0fd40c1d18e4376512d8e2aa155
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is disguised as a search result for a common query. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create SEO-optimized PDFs. The presence of numerous external links, many hosted on Shopify, further supports the SEO-based lure. The primary malicious IOC is the redirector URL.

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=export+pdf+to+word+mac+os+x
    • http://files.tankuanaw.com/uploads/1/3/1/3/131379612/eda4253071.pdf
    • http://files.ecicog.org/uploads/1/3/0/9/130969682/rulizo_bapotazoke_samejojojudu_jaxes.pdf
    • http://files.stickyfingersfiberart.com/uploads/1/3/0/8/130814432/zorogit-mafutemika-getopufapeguk.pdf
    • http://files.trinity-arc.com/uploads/1/3/0/9/130969059/jexaveg.pdf
    • http://files.souderlandscaping.com/uploads/1/3/2/6/132681479/tawuxokidexano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zobuwavidojanunixi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2258/0886/files/29908786700.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/gagufumo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7805/0201/files/92129565725.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/wolejabefopiduzisanu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3594/1274/files/44234405118.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40035930655.pdf
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/rezebexixoworak.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/bopewig.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_off000080d8.bin
8f9a750445c9ee8c3a7945869d826db92e85a8c36ac4cbcc25a14efc468c2784		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80D8 4900 bytes
font_01_sfnt_off00009191.bin
9ca42dd67068f284d0953bb467a88f4bde3b20995dd3c2cd00073cd050d97072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9191 10328 bytes

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