Malicious PDF — malware analysis report

Static analysis result for SHA-256 51e54f78fca247f1…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 13:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05d0ffbc9582bf7ab2ea4ee301bb49c0 SHA-1: 653bccc49bcce2730896b26d17a1bf2ace2e82c5 SHA-256: 51e54f78fca247f19cdaaaa01310187d28b43559cb7f6c1735b82f07ab2b53b0
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary URL, https://ttraff.com/wix?keyword=perdidas+insensibles+en+neonatos+formula, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to Shopify, suggesting a tactic to distribute malicious content through seemingly legitimate platforms.

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.com/wix?keyword=perdidas+insensibles+en+neonatos+formula
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/bajiwopanomumiwu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/estructura_de_los_milagros_de_nuestra_seora.pdf
    • https://cdn.shopify.com/s/files/1/0460/5755/4075/files/andyroid_for_mac.pdf
    • https://cdn.shopify.com/s/files/1/0434/3654/0056/files/50279365118.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5559/files/gazupa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8883/0873/files/backwards_design_lesson_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/logorasojopewafalize.pdf
    • https://cdn.shopify.com/s/files/1/0438/4214/2358/files/12740646828.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0402/files/59553533267.pdf
    • https://static.usrfiles.com/ugd/3b7182_a71e7ce6fb9947178aee8fc31a609b35.pdf
    • https://static.usrfiles.com/ugd/b8c837_bad97f0b12274ba5a00f058d6c8764b1.pdf
    • https://static.usrfiles.com/ugd/ad2ade_49a21a953b11473fa50ce7895fa14fe0.pdf
    • https://static.usrfiles.com/ugd/b8c837_4263e917e5ab430bbce7e8548f6d2abe.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ad401e2f0ad44e3bdb7dfb27595c193.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_off000068d1.bin
18a8f71035c3e16d46d433ff3c06e2fda5faed34a81536a3b9ce7c69b6922cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D1 5196 bytes
font_01_sfnt_off00007a5a.bin
c994b2ebdfc0f4233b1b7218810a8d17c4236d9e7783ac161ed88bb3959ac86d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5A 11664 bytes

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