Malicious PDF — malware analysis report

Static analysis result for SHA-256 06feab4508c18db4…

MALICIOUS

PDF

48.3 KB Created: 2020-08-30 21:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f840dabd8d424d73cf5d888901a1335 SHA-1: 1684ece39e0d8cf2529b0bb8dba6bbfeb4f11976 SHA-256: 06feab4508c18db4e3c0ab22d0078fd3c8ca8232587b8aa13cca3c732f134052
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is ttraff.me, which is flagged as a redirector. The document body, though heavily obfuscated, contains text suggesting it is related to 'mcat books pdf', indicating a lure to entice users to click the malicious link. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=mcat+books+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/39382159490.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/pukaripetib.pdf
    • https://cdn.shopify.com/s/files/1/0431/3448/4648/files/20394010675.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/47291236636.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0016/files/66268455920.pdf
    • https://cdn.shopify.com/s/files/1/0431/0528/8352/files/liberal_arts_math_flvs_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/5158/1591/files/ielts_general_training_writing_task_1_samples_band_9.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2523/files/wudexokedugezivax.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/avl_tree_c_github.pdf
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/modufixavevabemivib.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4631/files/wowupakoda.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5388/files/10299007084.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_0a8f26e2d4a5483aaf4376359c072048.pdf
    • https://static.usrfiles.com/ugd/61f964_1394ac51996e4dceab0ce5c58062a88f.pdf
    • https://static.usrfiles.com/ugd/6c032c_a883e8edc1794e2b9d71340c392301a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_78649abb3d80431f8a9bf0224a081a4f.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000686a.bin
6d315691d2bd7220ec3d1824ed13ee130adf583e70f1c497d691f889e4396063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686A 5232 bytes
font_01_sfnt_off00007a46.bin
2c607abcb56b8c3db38bb7846f152b73fd5cb9151b636fccb1b3c94b404ad72f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A46 10592 bytes
font_02_sfnt_off00009ec2.bin
028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC2 16312 bytes

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