Malicious PDF — malware analysis report

Static analysis result for SHA-256 92d2a1c954491f17…

MALICIOUS

PDF

60.8 KB Created: 2020-08-09 05:28:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b6f1a07944864fbe2c154776f0a3cac SHA-1: 72b9473d2200866f5c84879f0c81ddcbdad9f55e SHA-256: 92d2a1c954491f173066287c13eab575812403885cd12b56fd436aa11c739d20
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=the+braggart+soldier+pdf'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure.

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.cc/pify?keyword=the+braggart+soldier+pdf
    • http://solupuna.countryleisureuk.com/uploads/1/3/1/0/131070476/1261009.pdf
    • http://files.pierreraby.com/uploads/1/3/1/4/131407012/7331cd81e3b1b90.pdf
    • http://files.formosagardensnursery.com/uploads/1/3/1/3/131380558/9434715ec.pdf
    • http://files.newhopewindham.org/uploads/1/3/0/7/130740073/ba522241a43ba0.pdf
    • http://files.aveac.org.uk/uploads/1/3/2/3/132303163/kofetibuzasoki.pdf
    • https://cdn.shopify.com/s/files/1/0428/1267/0111/files/88062474600.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wirokole.pdf
    • https://cdn.shopify.com/s/files/1/0434/2962/6017/files/xusonirofozogulu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/90320105433.pdf
    • https://cdn.shopify.com/s/files/1/0428/3082/3583/files/vepejeliredowivalojaxa.pdf
    • https://cdn.shopify.com/s/files/1/0447/3297/3205/files/muslim_baby_names_with_meaning_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2858/6402/files/dozutakesewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1964/files/pulubavawugemag.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1569/files/sasajolawivusulazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6740/0601/files/23674241755.pdf
    • https://cdn.shopify.com/s/files/1/0431/5735/6710/files/xidexaloxataramaf.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_off0000aec1.bin
9b0d81078557a7cb76697d2d233162fdf8dc5938cf88b1466a62f688cb17ccfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC1 5392 bytes
font_01_sfnt_off0000c106.bin
dfe3417993704d2714868cb5693e8b360aba7fe9340f1fa94fc2c93c7f209710		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC106 10480 bytes

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