Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a8dd785257bf2a…

MALICIOUS

PDF

47.6 KB Created: 2020-08-19 05:42:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2b0caed93a32014033954601bf2ef69 SHA-1: fc282618859e6a32b9e37d80d2ef383ffd96567f SHA-256: 27a8dd785257bf2a34a1a82553d0331b2ffb2eba8761f07987cda6db60a0cbf0
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, a common tactic for SEO link farms and phishing campaigns. The primary malicious URL, 'https://ttraff.cc/pify?keyword=android+sdk+extras+intel+hardware_accelerated_execution_manager', is identified as a malicious redirector. While many other links point to benign Shopify domains, the presence of the redirector and the sheer volume of links suggest an attempt to lure users to malicious content.

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=android+sdk+extras+intel+hardware_accelerated_execution_manager
    • http://jimilel.sydneymilitaryofficersspringball.com/uploads/1/3/1/4/131453598/2836334.pdf
    • http://files.dustinedwards.org/uploads/1/3/0/7/130776590/kizajojof-naxoturuz-jidozunax.pdf
    • https://cdn.shopify.com/s/files/1/0435/2642/2687/files/32208060151.pdf
    • https://cdn.shopify.com/s/files/1/0429/3961/3347/files/dudidekom.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/69019110930.pdf
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/neoclassical_economics_vs_classical_economics.pdf
    • https://cdn.shopify.com/s/files/1/0434/7386/2808/files/lekekawumawezutumalufazi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3778/4224/files/management_information_systems_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0436/5107/2158/files/20727223954.pdf
    • https://cdn.shopify.com/s/files/1/0440/2796/9686/files/towovonalujujonibos.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevimofurerofujasopam.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/3896151717.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_off00007952.bin
51365b06f80d62c99fd6546aeb0ef0fd46b86c8e41f2df27cc3ec777c64109a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7952 5596 bytes
font_01_sfnt_off00008c4a.bin
8bcda9ada7a7cc33b597ba18631428e18eeffee4b838b9c99a748301e1a9c2cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4A 10900 bytes

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