Malicious PDF — malware analysis report

Static analysis result for SHA-256 eff671a53eef9125…

MALICIOUS

PDF

40.6 KB Created: 2020-08-05 23:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a94a7238dcfb000525874dee6f39028e SHA-1: cc022c5cbf2504f3bbb4bd795d00d823119fe0b7 SHA-256: eff671a53eef9125443722531dcd9f7a91c7cec2324888c4873ca0249bb3411a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'commercial storyboard template pdf' and the malicious URL. The ML classifier strongly indicates maliciousness, and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms the intent to redirect users to harmful content.

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=commercial+storyboard+template+pdf
    • http://files.hmonghistorycenter.org/uploads/1/3/0/7/130739287/xudasuzovezururutu.pdf
    • http://files.kerncanineactivities.com/uploads/1/3/1/3/131382239/fifubiratujo.pdf
    • http://files.fleetojesus.org/uploads/1/3/0/8/130874526/4ee9140.pdf
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/duwibevamipupibejet.pdf
    • https://cdn.shopify.com/s/files/1/0438/6357/2635/files/mazotisoribatixubejasozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/begekuped.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3350/files/mufabik.pdf
    • https://cdn.shopify.com/s/files/1/0434/2074/5893/files/63183631410.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/convert_to_word_app_for_iphone.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/wefixabezaxesawap.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/gegefegudigetekafetajuza.pdf
    • https://cdn.shopify.com/s/files/1/0439/8972/9438/files/mysql_split_string.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/sifupejefepenawevezitoxod.pdf
    • https://cdn.shopify.com/s/files/1/0429/5809/4495/files/89648678160.pdf
    • https://cdn.shopify.com/s/files/1/0431/3038/8642/files/black_s_law_dictionary_tenth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/58842975679.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_off0000626e.bin
5ff8f1a5c31d9ad5cf09334ae4c428ba3c59a6192d044198fe9fea65ad3530ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 5448 bytes
font_01_sfnt_off000074d9.bin
99aba4a2729fc2376a173865102671acd54429f575d93dc153bf75a2a4fe0b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D9 9780 bytes

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