Malicious PDF — malware analysis report

Static analysis result for SHA-256 090360686188dbf7…

MALICIOUS

PDF

47.9 KB Created: 2020-08-12 06:46:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 130e8afa266eb072ca819a5b8eb307fc SHA-1: 4b5eb48a7a3afc62c852eb34ef2d7286abdee1ee SHA-256: 090360686188dbf7ba2dc884282f59bdba4f63d4a5d8a525add8db852e5a3059
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are part of a link farm designed to redirect users. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malicious content delivery attempt. The ML classifier also strongly indicated maliciousness.

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=community+organizing+participatory+action+research+pdf
    • http://files.gitxsansimalgyax.com/uploads/1/3/0/7/130775245/dijanebi.pdf
    • http://files.hopeforliberians.org/uploads/1/3/1/4/131482953/fosetipu-luzakupeg-napizi.pdf
    • http://files.redmondmathblog.com/uploads/1/3/2/3/132302923/8512698.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/0948/6498/files/product_costing_methods_in_manufacturing.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/54418557855.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/pozanasadalusuwim.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/annihilation_jeff_vandermeer_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1082/6146/files/cantabile_et_presto_flute.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/lejudomugitaw.pdf
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/15617863212.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/a_twist_of_the_wrist_vol_1.pdf
    • https://cdn.shopify.com/s/files/1/0438/3673/5645/files/74835232541.pdf
    • https://cdn.shopify.com/s/files/1/0449/6493/7896/files/tv_azteca_m3u.pdf
    • https://cdn.shopify.com/s/files/1/0431/6335/3244/files/sort_vector_c.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6833/files/argumentative_speech_example.pdf
    • https://cdn.shopify.com/s/files/1/0433/6828/4316/files/yung_joc-_hustlenomics.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4568/files/putakakuvufarodivekew.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_off0000634d.bin
b60af9b87016b6b699435f918fc06b45bc0bd82cbc69d7721f6f382ee1071419		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634D 5592 bytes
font_01_sfnt_off00007632.bin
defbbcece37b995a6eb6e6204af38e197e35393a41097897492482ff384435e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7632 11532 bytes
font_02_sfnt_off00009d75.bin
2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D75 16060 bytes

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