Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d2232d1860b620…

MALICIOUS

PDF

37.9 KB Created: 2020-08-03 15:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6496c5d7ddbc588af52b4cec7cf07bbc SHA-1: 566faaf90f41983cd9dde834f7dcbf14e6550ea4 SHA-256: a5d2232d1860b6207cb2168317caa76ac81008adabea05c6486bb23e7df06ed4
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to a known malicious redirector. The document body and embedded URLs confirm this, with a primary URL pointing to a redirector service. This suggests the document's purpose is to lure users to malicious infrastructure, likely for phishing or malware delivery.

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.ru/pify?keyword=libro+ciencia+de+los+materiales+dentales+phillips+pdf
    • http://files.lifeofpen.com/uploads/1/3/1/4/131437074/kumijogoz-xabijaxep-pigexutulifar-lediwefoburosok.pdf
    • http://files.istudentsduke.org/uploads/1/3/0/8/130873810/barijemebar_pavozuroput_bojibi_forupusasupinul.pdf
    • http://files.fabricsatfleetwood.com/uploads/1/3/0/8/130814923/38beb8.pdf
    • https://cdn.shopify.com/s/files/1/0430/8644/6746/files/16256492395.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1082/files/10217319349.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/9090740429.pdf
    • https://cdn.shopify.com/s/files/1/0432/0903/1840/files/avr_sleep._h.pdf
    • https://cdn.shopify.com/s/files/1/0436/8069/4437/files/6887978325.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9863/files/sapadorapuwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/simowilirukovawuweb.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/47558942281.pdf
    • https://cdn.shopify.com/s/files/1/0430/6662/2105/files/10586674440.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9856/files/mitususapunipefoxukujepuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/git_restore_deleted_branch.pdf
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/adaptability_dark_souls_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/8103/9013/files/sozewunem.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_off00005491.bin
fd31749c3085a765c6b10377857761bec032c671a15a9d49320e06761c7a2fd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5491 5476 bytes
font_01_sfnt_off00006706.bin
57d106216341e9045dc6acb0adf4a57fea188c22daa05f096f7a33d2410af521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6706 10192 bytes

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