Malicious PDF — malware analysis report

Static analysis result for SHA-256 5630d40475f190db…

MALICIOUS

PDF

34.6 KB Created: 2020-08-14 21:16:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8874d7bd2cb627f6907eed62fbce5673 SHA-1: 6fc548562de650f96660231295ef494e88eeb00e SHA-256: 5630d40475f190dbd04b94a5b427dba70568b078cbc84c53a0bed75127885003
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'analyzing poetry worksheet elementary' and the malicious URL. This suggests a social engineering tactic to trick users into clicking the link, likely leading to further malware delivery or phishing.

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=analyzing+poetry+worksheet+elementary
    • http://nexuporus.tylerhampong.com/uploads/1/3/2/8/132814930/330381.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/bacteriologia_y_virologia_veterinaria_merchant_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5032/8486/files/carson_dellosa_math_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/26312189919.pdf
    • https://cdn.shopify.com/s/files/1/0435/4742/6971/files/2169828416.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/51726187974.pdf
    • https://cdn.shopify.com/s/files/1/0434/2887/2359/files/nubopesupuzoromiven.pdf
    • https://cdn.shopify.com/s/files/1/0431/3628/6877/files/toditevirafu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7509/2132/files/gajuwolejozudunas.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/11563157252.pdf
    • https://cdn.shopify.com/s/files/1/0430/8333/3799/files/the_root_cellar_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/2994/4730/files/antiulcer_activity_of_medicinal_plants.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_off00004953.bin
2f3aca234ad592ba14d52fd9067483922cd15d1b4cae5bf2950d2721af979ffe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4953 5532 bytes
font_01_sfnt_off00005c1b.bin
b64e661f7fac0bce0defc4feed22c80000d3ef38882cc47b59ea03a803087642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1B 9880 bytes

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