Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7429395a8830a99…

MALICIOUS

PDF

41.5 KB Created: 2020-08-31 16:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e7b5c3b1861c2fca4350710f3eec4c SHA-1: c83c02a583e15f39c908e373aad400dcbd4b3e75 SHA-256: e7429395a8830a992270c716adcb415b467f4bb905c167875853bf62ba005fa9
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL, 'https://ttraff.com/pify?keyword=differentiation+of+trigonometric+functions+homework+answers', is flagged as malicious. The document body, though heavily obfuscated, contains this URL and appears to be a lure related to homework answers, suggesting a phishing or scam attempt.

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.com/pify?keyword=differentiation+of+trigonometric+functions+homework+answers
    • https://cdn.shopify.com/s/files/1/0431/8789/6488/files/electronic_signature_in_adobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/mekaladojijozo.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/54873859854.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/xiviji.pdf
    • https://cdn.shopify.com/s/files/1/0434/8451/2406/files/dilizejufel.pdf
    • https://cdn.shopify.com/s/files/1/0437/9875/7538/files/sovorosexonasepu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/tumejef.pdf
    • https://cdn.shopify.com/s/files/1/0428/9570/4227/files/42267925011.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/79504974086.pdf
    • https://cdn.shopify.com/s/files/1/0432/1109/6221/files/42727112142.pdf
    • https://cdn.shopify.com/s/files/1/0434/8706/8322/files/arcmate_120ib_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6102/6719/files/guxijerixefawedogez.pdf
    • https://cdn.shopify.com/s/files/1/0438/9987/9576/files/28930290281.pdf
    • https://cdn.shopify.com/s/files/1/0438/2811/7661/files/kabbalah_el_poder_de_cambiarlo_todo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2783/files/2019_election_results_south_africa.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_off000063e4.bin
9ea04520ffe1df2ae3bedc0b2439c088c767e90e2323fbdfd276830938fc739c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E4 5420 bytes
font_01_sfnt_off00007645.bin
2eee5b40ef326c478a47d2e91736fbb11fe4d74076c0eae94f4780818e1331ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7645 10248 bytes

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