Malicious PDF — malware analysis report

Static analysis result for SHA-256 56e21a5aa926c2cc…

MALICIOUS

PDF

50.0 KB Created: 2020-07-31 03:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3e3d478a394e3db2bb3f25d431f9cea SHA-1: c931d1bdcd5484c83fc14591159c6ea42e52a3b0 SHA-256: 56e21a5aa926c2cc6c01097e0b15f1c68c0bb432907cc1bc969a2a3dc0a81156
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is designed to lure users to a phishing page, impersonating a Citibank credit card application. The document body, though heavily obfuscated, contains keywords related to the URL, reinforcing the phishing pretext. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm used to obscure the malicious redirector.

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/pify?keyword=citibank+philippines+credit+card+application+form+pdf
    • http://files.kefashion.online/uploads/1/3/1/4/131437475/9034812.pdf
    • http://files.carolgrice-curran.com/uploads/1/3/1/8/131871414/xijugonaru.pdf
    • http://files.gymtymenow.com/uploads/1/3/1/3/131381919/ziwonuben.pdf
    • http://files.kocanada-usa.com/uploads/1/3/1/3/131380596/e1d41f43b7b2b.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0489/files/62488493239.pdf
    • https://cdn.shopify.com/s/files/1/0439/2737/1931/files/45182659177.pdf
    • https://cdn.shopify.com/s/files/1/0436/9675/0742/files/122411783.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/20688129732.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/luxajezovavekixemurukar.pdf
    • https://cdn.shopify.com/s/files/1/0428/5503/9135/files/63113317904.pdf
    • https://cdn.shopify.com/s/files/1/0433/6009/2309/files/pepinifuvoxak.pdf
    • https://cdn.shopify.com/s/files/1/0435/8399/6063/files/fisadowozevigatu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0629/5201/files/kobupotadag.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6032/files/fuvivopezomirowax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1402562920.pdf
    • https://cdn.shopify.com/s/files/1/0434/0488/6166/files/zavukubit.pdf
    • https://cdn.shopify.com/s/files/1/0433/5045/8520/files/basavuwugomavunusoto.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_off000080ce.bin
7fc2ca98139a6de038552ae85ba137bea9e90e808e103e8c8fa38c81c640b6a2
pdf-font-stream PDF embedded font (sfnt) at offset 0x80CE 5412 bytes
font_01_sfnt_off000092fb.bin
14af356aae7063ed00191d702d81e0c7c40f92743e095b7295515d3145be4e32
pdf-font-stream PDF embedded font (sfnt) at offset 0x92FB 11340 bytes