Malicious PDF — malware analysis report

Static analysis result for SHA-256 e40205ad6461b1ff…

MALICIOUS

PDF

35.6 KB Created: 2020-08-20 22:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bff0d0c6af2ce27074dee2018fbd648d SHA-1: b5235659a9665a5a278ff7d15325d0079c494aba SHA-256: e40205ad6461b1ff71680648369c264e1a3797a29e948fa0c3cfff7e08b709da
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=waterloo+sunset+sheet+music+pdf'. This indicates the document is designed to redirect users to a potentially harmful destination. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility and clicks. The ML classifier also strongly flagged this PDF as malicious.

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=waterloo+sunset+sheet+music+pdf
    • http://files.antsrus.com/uploads/1/3/1/0/131069992/nizoxag_nidaxe_zekiwupe_rifulepofa.pdf
    • http://guduren.lwvmontclairarea.org/uploads/1/3/1/3/131379410/7549200.pdf
    • http://files.venusdirections.com/uploads/1/3/0/7/130775952/teneweb_vogodiro.pdf
    • http://zazoluk.hughesling.com/uploads/1/3/0/8/130813821/6267809.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/beautiful_creatures_book_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3525/4171/files/83411370992.pdf
    • https://cdn.shopify.com/s/files/1/0431/2249/1553/files/comment_couper_un_en_2.pdf
    • https://cdn.shopify.com/s/files/1/0435/2429/2762/files/biological_diversity_act.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0334/files/befagafapimovigololusaxaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0324/8803/files/thanks_letter_to_boss_for_appreciation.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/introduction_to_c_programming_notes.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5694/files/fanoxalagovakerazibod.pdf
    • https://cdn.shopify.com/s/files/1/0440/5251/2918/files/chief_keef_faneto_mp3_download.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_off00004b70.bin
3b678b1525a53f29eb5ffff7d1b66fd032a374e8f6e0166840e889784e491014		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B70 5408 bytes
font_01_sfnt_off00005db0.bin
f3e2065f7cdf42c4d003f83fa7d2a802e2b15ef55fbbe15d5a76e43b0d84f716		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB0 10592 bytes

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