Malicious PDF — malware analysis report

Static analysis result for SHA-256 efab559ab547ec7d…

MALICIOUS

PDF

43.7 KB Created: 2020-08-18 16:28:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0004bc361d4bb6ede0cffc0aa35aa7ef SHA-1: 61572790a36f0deccc2df1c2018fed35179ae448 SHA-256: efab559ab547ec7d441e65476998ca18dac651a0c2e676e40a753234294a7b7b
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm. One critical heuristic identified a malicious redirector link, 'https://ttraff.cc/pify?keyword=sanguine+choleric+melancholic+phlegmatic+personality+test+pdf', which likely serves as the initial lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the structure and embedded links strongly suggest a social engineering attack aimed at directing users to malicious or spam 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=sanguine+choleric+melancholic+phlegmatic+personality+test+pdf
    • http://bopul.vigilantics.com/uploads/1/3/1/1/131164104/6947007.pdf
    • http://files.cycle-logical.co.uk/uploads/1/3/2/6/132695408/banowivemev_sotulafe_kinogezikunak.pdf
    • http://files.inspirationoftime.com/uploads/1/3/2/8/132815882/dc5641e9d.pdf
    • http://bomol.thinklearnact.com/uploads/1/3/0/8/130874359/kufusip.pdf
    • https://cdn.shopify.com/s/files/1/0433/4521/5656/files/wokadopopeferifix.pdf
    • https://cdn.shopify.com/s/files/1/0431/5712/7336/files/caterpillar_generator_sets_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/farizupubimadixux.pdf
    • https://cdn.shopify.com/s/files/1/0437/1575/6181/files/madoka_magica_rebellion.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/life_a_user_s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/9417/8982/files/22062649752.pdf
    • https://cdn.shopify.com/s/files/1/0440/6686/5302/files/97641304749.pdf
    • https://cdn.shopify.com/s/files/1/0440/4363/2805/files/zeweradimopilupolalaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2680/files/gomupebixezunizebajeworo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6874/2039/files/68086912861.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/28109700375.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_off00006947.bin
6937ee0bc34d8408721329e5b2d03fd4a61af76d4d6197b9d1d74d7e5aa17740
pdf-font-stream PDF embedded font (sfnt) at offset 0x6947 5776 bytes
font_01_sfnt_off00007cc2.bin
2ce3778b81d98182f14e36c57871fff8a74e7066eadebb659700aa7e400f26f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC2 10760 bytes