Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc5b2b234a2e479…

MALICIOUS

PDF

40.4 KB Created: 2020-08-09 23:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4440009a1fd63ed1b934381ee624f9ec SHA-1: c8ac05752232095f1a2dd6848bae8435a387aa80 SHA-256: 7dc5b2b234a2e479e12c803c7db452029fa27ad1f395c2a2cbdbeca743251613
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting an SEO spam or link farm operation. One prominent link, 'https://ttraff.cc/pify?keyword=area+of+geometric+figures+pdf', is flagged as a malicious redirector, indicating a likely phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same keywords and URLs, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=area+of+geometric+figures+pdf
    • http://files.susanmeehan.net/uploads/1/3/2/8/132816202/7650695.pdf
    • http://files.brunswickelections.com/uploads/1/3/2/6/132695572/pibobo.pdf
    • http://files.patgreenwellartist.com/uploads/1/3/0/8/130874201/a948f7bf2d9967.pdf
    • http://zuvukufot.southamptonisoc.org/uploads/1/3/1/3/131379578/9753008.pdf
    • http://files.catalystmsm.com/uploads/1/3/2/6/132683334/8340257.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2490/0515/files/kutovigupon.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1734/files/80496449476.pdf
    • https://cdn.shopify.com/s/files/1/0428/6591/8118/files/antasida_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xodowowesibaxen.pdf
    • https://cdn.shopify.com/s/files/1/0435/3150/1720/files/dikanozex.pdf
    • https://cdn.shopify.com/s/files/1/0437/3698/9850/files/62980106428.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/workout_timetable.pdf
    • https://cdn.shopify.com/s/files/1/0433/4462/5822/files/bewifulunopamevusax.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/16687134743.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/womotomakiwuxaxebet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lafiku.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f2c.bin
5780faafd68787b5ffb38373ad5a326c3f308779cb8c4f3ba2f7e5f7a77150f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2C 5432 bytes
font_01_sfnt_off00007194.bin
268c7193b6e0724fe21c454c8bf6d55301b749b60207f647aeb40be28bcbf81b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7194 10316 bytes