Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f1edb94ece1c19…

MALICIOUS

PDF

42.6 KB Created: 2020-08-09 05:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9bb9fca2e10db0f4fd3805fcfab6076 SHA-1: b0fc1f9c87410454c115d3670bb6fcb4a82b70d6 SHA-256: 50f1edb94ece1c19db42b1dee1f1562dcf3b552454c050af68a0159e9619afc8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF document was flagged as malicious by a machine learning classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=attribution+theory+of+leadership+pdf`. The document body, though heavily obfuscated, also contains this URL and other links pointing to external PDF files hosted on various domains, suggesting a link farm or redirection strategy. The primary attack pattern involves luring users to click these links, which likely lead to malicious content or phishing pages.

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.ru/pify?keyword=attribution+theory+of+leadership+pdf
    • http://files.unitydenton.org/uploads/1/3/0/8/130874250/danatinigamiza_toniraso_kekuxiziki.pdf
    • http://bomifa.sthelenaassociation-uk.org/uploads/1/3/1/6/131606552/e75715.pdf
    • http://files.paletteandpaper.com/uploads/1/3/2/8/132815753/33c02deff7f4b97.pdf
    • http://files.ohsweetbakery.com/uploads/1/3/1/0/131069789/4d506.pdf
    • http://files.ocbeerco.com/uploads/1/3/1/4/131406751/5541537.pdf
    • https://cdn.shopify.com/s/files/1/0433/7909/7758/files/48452461708.pdf
    • https://cdn.shopify.com/s/files/1/0436/5287/4390/files/nozovowofediparorekim.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3186/files/pajarinomaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/2841/3607/files/vegefaxoroj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/fijifarugekaberex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25346701784.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7278/files/moboselibotosolite.pdf
    • https://cdn.shopify.com/s/files/1/0430/3893/3146/files/88916917418.pdf
    • https://cdn.shopify.com/s/files/1/0429/2503/1587/files/53796396173.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2831/files/adobe_illustrator_cs5_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0432/5877/3662/files/zukixagemerubogu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4481/files/acl_repair_rehab_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/46874693526.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_off00006773.bin
6c16bf5e516785ce7373f8508fc04ece73ae4986847517083974df67bc2c964d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6773 5360 bytes
font_01_sfnt_off000079af.bin
db798321937f34d1103aaac6f347f7cec2ab085ec01e65b5d6a80eff31c4167f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AF 10488 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.