Malicious PDF — malware analysis report

Static analysis result for SHA-256 50519ee8e8414a99…

MALICIOUS

PDF

54.8 KB Created: 2020-08-31 05:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62baf67ab2cf40535172a900f3480829 SHA-1: c625e33aeb99442d49935a3ec5a49285f6ccd73f SHA-256: 50519ee8e8414a99660c4273868188d504b742abd63de786b4e4b3476a256250
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which points to ttraff.ru. The document body also contains this URL, along with numerous other benign-looking Shopify URLs, suggesting a link farm or SEO poisoning tactic. The primary malicious URL is likely intended to redirect the user to a phishing or malware distribution site.

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/wix?keyword=learning+english+vocabulary+and+grammar+through+short+stories+pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5371/files/calendar_june_2020_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/9790/6589/files/cra_authorization_form_1013.pdf
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/liketokobizugusamakerobig.pdf
    • https://cdn.shopify.com/s/files/1/0438/4351/8629/files/konux.pdf
    • https://cdn.shopify.com/s/files/1/0459/0452/7514/files/94944279201.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9674/files/mebetotukexejika.pdf
    • https://cdn.shopify.com/s/files/1/0427/7387/2807/files/oriflame_catalogue_december_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/2645433849.pdf
    • https://cdn.shopify.com/s/files/1/0428/3331/3958/files/verklarende_afrikaanse_woordeboek.pdf
    • https://cdn.shopify.com/s/files/1/0430/7995/8679/files/89145820453.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/bncc_2020_ensino_fundamental.pdf
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/free_printable_letter_f_coloring_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/62464331971.pdf
    • https://cdn.shopify.com/s/files/1/0447/8897/3729/files/expense_list_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/16759580931.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_off000097ba.bin
147756e8ff79511104e7a4a1c8cdceac42301785b5190fb55ff1f78c11555990		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97BA 5812 bytes
font_01_sfnt_off0000ab62.bin
a88181a04244c85c2b026c1244668690bbf99eb0e270f8821c98d19b401aeeed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB62 10088 bytes

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