Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b915674a0e0fdd…

MALICIOUS

PDF

43.1 KB Created: 2020-08-30 20:13:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bea08b0103e33d19403609d316e63f28 SHA-1: c7d5c4550099229bb743c7538b198c34b32fe549 SHA-256: e4b915674a0e0fdd815fa8154d06438f9d462f48f4c1bebd90fd899d90457959
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=el+decalogo+del+abogado+pdf'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL and other Shopify URLs, suggesting a lure to external content. The primary intent appears to be redirecting users to malicious infrastructure.

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=el+decalogo+del+abogado+pdf
    • https://cdn.shopify.com/s/files/1/0433/1739/5611/files/7699853036.pdf
    • https://cdn.shopify.com/s/files/1/0433/9541/6213/files/hoggs_of_fife_hat_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0443/1645/9164/files/ready_player_one_epub_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12091312038.pdf
    • https://cdn.shopify.com/s/files/1/0438/3503/1712/files/23414748204.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/plumbing_fixtures_installation_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/3600/8870/files/zakufevomaboforokape.pdf
    • https://static.usrfiles.com/ugd/b8c837_a537ae959a0645fc88f83c3f9f9ff5cd.pdf
    • https://static.usrfiles.com/ugd/45e30f_6016794bca154f8692898bb99d37402d.pdf
    • https://static.usrfiles.com/ugd/b8c837_808dcbcd55bd42d580d2a6857c57554a.pdf
    • https://static.usrfiles.com/ugd/6f9b04_c081734cc6e648dda376a4b369f403a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_aed35aa1fc134d989308ae735df3f3d2.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/50959730253.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/12549274513.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_off0000695a.bin
c5bf6f22ea612f05ccf0553e5db0e8678fa20b2e120c91b3e43682cafcac3fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x695A 5148 bytes
font_01_sfnt_off00007af1.bin
3fd2fd5de76e87867783962b3872ae43cc84a927c2e3306f003bb4411d4cbb36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF1 10900 bytes

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