Malicious PDF — malware analysis report

Static analysis result for SHA-256 154d53c55c3b3a41…

MALICIOUS

PDF

49.5 KB Created: 2020-08-11 03:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 690df9b784bc6ec8f4fd77cad3207b1d SHA-1: d8582971a3cbfce62dea8943cda41aab110bd54e SHA-256: 154d53c55c3b3a41c42da1d6c297467cbe1d961f6a6db94bf71c4d818073ce37
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document also hosts a large number of other PDF files, suggesting a link farm or SEO poisoning attempt. While no scripts were directly extracted, the ML classifier and redirector link strongly indicate malicious intent.

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.cc/pify?keyword=zero+waste+management+philippines+pdf
    • http://ranixegos.thatonecouple.net/uploads/1/3/1/6/131606289/dawixojojilufis_ruduludo_xotuzodutoxasu.pdf
    • http://files.gcctraining.net/uploads/1/3/2/6/132682564/tufoju.pdf
    • http://jojexutuk.stand2serve.org/uploads/1/3/2/8/132814930/boderuwiwimekenu.pdf
    • http://files.clubraffles.online/uploads/1/3/1/4/131438018/d2ee8f0e8c9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/5893/8531/files/lurumamodipumo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/principais_abordagens_da_administrao_clssica_at_contingencial.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/41825305341.pdf
    • https://cdn.shopify.com/s/files/1/0430/0305/2191/files/vaperigaxevavo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6036/2392/files/75788104564.pdf
    • https://cdn.shopify.com/s/files/1/0430/4371/7274/files/44132908081.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lobusine.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0436/5520/0918/files/full_block_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0437/2119/5669/files/47062471746.pdf
    • https://cdn.shopify.com/s/files/1/0430/5757/8138/files/python_pandoc_docx_to.pdf
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/sewezukevopaxawuwofudofad.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/pugiru.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1146/files/89939592053.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008186.bin
706e7a8408e1c74a0f2d507c858e5aa11e29560edda3716f2c83ca6c2051a7d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8186 5504 bytes
font_01_sfnt_off0000941d.bin
07d74039e8060a1d23296b05e3bd720fe1b7c4f0eeb7ca15a07c6051f6acbabb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x941D 10636 bytes

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