Malicious PDF — malware analysis report

Static analysis result for SHA-256 a493cfd033bb00e2…

MALICIOUS

PDF

39.5 KB Created: 2020-08-28 04:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 215c7bd746ddbcc5e0397b0acf974e61 SHA-1: 0cc3d107099292a5f722bffa4b0ae2e8cf515b97 SHA-256: a493cfd033bb00e2d8e805eb70599b976d94fd3b755d8377acd0961ac33ed029
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The document body also contains text that appears to be a lure for a social engineering attack, instructing the user to press Win+R or paste a command, consistent with ClickFix attacks. The presence of a malicious redirector and the social engineering lure strongly suggest an attempt to deliver a second-stage payload or phish credentials.

Heuristics 4

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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=reinstall+tap+driver
    • http://bifawoka.onwgaming.com/uploads/1/3/0/9/130969060/vumek.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/winilevegefebukuwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8414/4037/files/sodaneboketesenan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/jogesifarepenukogazunis.pdf
    • https://cdn.shopify.com/s/files/1/0438/5583/9382/files/metonofug.pdf
    • https://cdn.shopify.com/s/files/1/0462/7254/4917/files/juxipabuxotidupenuneriru.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/34009916532.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/pubojelelafuteforuzedufu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3408/files/que_es_esquema_corporal.pdf
    • https://cdn.shopify.com/s/files/1/0437/7119/9642/files/sec_to_millisec.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/how_to_uninstall_xbox_games_on_pc.pdf
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/autodesk_2019_xforce_keygen.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_off00005de5.bin
c6d45ca2f463af8b70717d9798e926c66202e2b1b8759867de7a8138f0ba473f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE5 5020 bytes
font_01_sfnt_off00006f09.bin
1e1d871e24157bb635136d707610d9ecd68a281925631ec016c2436e36f2dd02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F09 10068 bytes

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