Malicious PDF — malware analysis report

Static analysis result for SHA-256 80c8ed159e74d313…

MALICIOUS

PDF

41.2 KB Created: 2020-08-24 09:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c337dc999b6ee9bbbb31a8893e62f295 SHA-1: 615ebb6f79482446ebf59aee76dcda4ba8672860 SHA-256: 80c8ed159e74d313ab170fcbda20dfb88aae8eb094ecb395e3ca340c70bdb1d2
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a lure for a "clash of clans cheat app free". The document also hosts a large number of external PDF links, many pointing to Shopify domains, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier strongly indicated maliciousness.

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=clash+of+clans+cheat+app+free
    • http://files.mimisbooksandmore.com/uploads/1/3/1/3/131398085/3031508.pdf
    • http://files.jamielferguson.com/uploads/1/3/1/3/131381919/pakuba.pdf
    • http://derakav.humphreyscountychamberofcommerce.com/uploads/1/3/1/4/131437657/9d7dc3402c.pdf
    • http://pajener.thaischool.org/uploads/1/3/1/6/131636825/163995.pdf
    • http://files.prismbehavioralconsulting.com/uploads/1/3/1/1/131163635/ca8c84e0dcbcf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5313/7576/files/negative_suffixes_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/2839/7728/files/pazejozelawimetoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/nejurokesafevilexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files/46921996101.pdf
    • https://cdn.shopify.com/s/files/1/0437/6444/9437/files/63931926326.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/system_of_a_down_toxicity_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/81638691378.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/fugosibotif.pdf
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/basis_set.pdf
    • https://cdn.shopify.com/s/files/1/0436/8374/1849/files/minolta_x-_700_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0359/files/esl_articles_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/7684/4694/files/80847981511.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_off0000642f.bin
25746e756bdc71251ff8b4bb43700bd358652bd10202b0e32af72d58c86ad27b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 5008 bytes
font_01_sfnt_off0000752b.bin
57d4a0269075df5b1d1ba987ac7f63ef5c1ba3cdbf126a55785d85f9a51428ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x752B 10196 bytes

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