Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa073356359ea9ff…

MALICIOUS

PDF

41.9 KB Created: 2020-08-12 22:19:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5197fac5fa28c81767a05b9d942c364a SHA-1: 68713713b113163c6e17e39460b63dfb8dd04111 SHA-256: fa073356359ea9ffb74d15cb5fbdbe9b1cd4be385e5038ed6defc0e31ff7b1f0
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign Shopify domains, but one critical link redirects to a known malicious domain, ttraff.com. This suggests a phishing or redirection campaign. The document body, though heavily obfuscated, contains the string 'Relatorio de auditoria financeira pdf' and the malicious URL, reinforcing the lure. The presence of numerous PDF links indicates a link farm strategy, likely to obscure the ultimate malicious destination.

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=relatorio+de+auditoria+financeira+pdf
    • http://files.prisonerfootballleague.com/uploads/1/3/0/9/130969751/2038453.pdf
    • http://nimusobez.ourgreattravelblog.org/uploads/1/3/1/0/131070161/vuwuvomidi.pdf
    • http://files.kingsfellowship.net/uploads/1/3/0/7/130738835/dovus-gimejadunivumuj-tenegafomovow-zafovaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/3486/8897/files/right_to_education_article_21a.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/ramawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2679/files/bitibasaxim.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7600/files/safejaxifemofukamuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3040/files/munuperilivifo.pdf
    • https://cdn.shopify.com/s/files/1/0445/6543/0431/files/amulet_book_series.pdf
    • https://cdn.shopify.com/s/files/1/0429/6510/6847/files/zavumidosekifojuxafu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9262/3001/files/kewerovuxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5571/8298/files/45179293254.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/bifadedafedijefaginogegix.pdf
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/gizapatetomopulalo.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/apj_abdul_kalam_quotes_in_telugu.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_off000066a4.bin
afbcd41c9e8a3d80aa4c065afd421d3f79cf0ee23cf259646952c65838ccf846		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66A4 4976 bytes
font_01_sfnt_off000077a7.bin
ff72b9b3935c1e107a20084a59c0cecec34f94cfbdfe553747921a2c4b675f18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77A7 10296 bytes

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