Malicious PDF — malware analysis report

Static analysis result for SHA-256 42090fea82bb01cb…

MALICIOUS

PDF

103.4 KB Created: 2020-08-23 15:16:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe497c3fff526f5d97f781102c37664e SHA-1: 65e6000832361ed4bfdefd0452a58df70cc37202 SHA-256: 42090fea82bb01cbe98c2a7a3094d07a1fd7ff68914cae90193bef8e550b0848
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, pointing to a URL that includes a wrestling theme keyword. This suggests a social engineering lure. The file also contains a PDF link farm heuristic, indicating an attempt to distribute links. The embedded URL is likely intended to redirect the user to malicious infrastructure for further exploitation or credential harvesting.

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/pify?keyword=bray+wyatt+the+fiend+theme
    • http://files.nugierfroom.com/uploads/1/3/2/6/132682063/76fbe1.pdf
    • http://retiza.pemtel.com/uploads/1/3/1/4/131438873/5da7bab78.pdf
    • http://files.smiths2argentina.com/uploads/1/3/2/6/132695560/mugakebebip-rivupi-zirukulejozepe-xakenagenijux.pdf
    • http://najabivov.preciousinvestltd.com/uploads/1/3/1/0/131070197/ravuwe.pdf
    • https://cdn.shopify.com/s/files/1/0432/8577/4491/files/81044651337.pdf
    • https://cdn.shopify.com/s/files/1/0438/3598/1974/files/wesew.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/lijizolekat.pdf
    • https://cdn.shopify.com/s/files/1/0430/6403/3429/files/mizubedagujoleboxazuka.pdf
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/figebipiwixuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/8930/5501/files/close_account_wells_fargo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5199/1719/files/68654787529.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/rukig.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/bob_online_account_opening_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/2408/0282/files/35462725799.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/wuxoxopepavodesema.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_off00015982.bin
598ba9bc50ac42056d96af447e104c3f1956d5dada37a8f1a1caefbe5b228b95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15982 5180 bytes
font_01_sfnt_off00016b0d.bin
059e78e77aaf8973d18f34f9bc47e5999b67f974240038eaf3cb7636f2cc42d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16B0D 10896 bytes

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