Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a0f2a9d1368e561…

MALICIOUS

PDF

97.2 KB Created: 2020-09-05 20:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 76af6201c5edc0ac257dfe2d0e95d3ff SHA-1: 00e0af13eb0857d1ad94f6da55a8c6a038269cf4 SHA-256: 0a0f2a9d1368e561a3ffecab1f4f22b8ff7ac472713b96ff66f3f3bb5fb5cb92
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the target URL, suggesting a phishing or redirection attempt to a malicious site.

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.com/pify?keyword=bhartiya+arthashastra+in+marathi+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/my_dog_smells_so_bad.pdf
    • https://cdn.shopify.com/s/files/1/0429/3135/5807/files/apostrophe_worksheets_ks2.pdf
    • https://cdn.shopify.com/s/files/1/0439/2920/6952/files/instantiate_a_template_class_java.pdf
    • https://static.usrfiles.com/ugd/c3f88d_3ae99b9cc98d40a7baeab96036f00c82.pdf
    • https://static.usrfiles.com/ugd/268ab1_8292af80735f41729709c5635cf723d9.pdf
    • https://static.usrfiles.com/ugd/9421c8_a845ee7eda714a3288d5927a5ce640fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_53b0291f9c78495bab1a7d9d37955ae1.pdf
    • https://cdn.shopify.com/s/files/1/0460/8144/1956/files/kegasuseragutej.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9477/files/free_flight_simulator_aircraft_s.pdf
    • https://cdn.shopify.com/s/files/1/0429/5226/1795/files/10118415450.pdf
    • https://cdn.shopify.com/s/files/1/0431/7606/7228/files/zoximosabuwobowup.pdf
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/jixawevotewigiwetuvoxe.pdf
    • https://static.usrfiles.com/ugd/13ae68_30ea80ef1427485e8c308989222e2364.pdf
    • https://static.usrfiles.com/ugd/d3758e_1c92e24c1ba245ccb850104979dc4d41.pdf
    • https://static.usrfiles.com/ugd/c1108c_1ecdf9c31f4d4c6e84eed3fadaa29ba4.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c58.bin
c6c9b0eb52623afd5ab1092f118ada2c621b59f1eb599ff26927766c2c7eadd2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C58 5400 bytes
font_01_sfnt_off00012e93.bin
e2c7bb3c6d2fbc6b9680c858ce58af9e5cd0e4fbc18f33bdd2ad1d5654d08a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E93 3772 bytes
font_02_sfnt_off00013a37.bin
2961e25fe3fcd5309c7e10767119123f9f7a179e71ecba1b7efe909d678be4cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A37 10492 bytes
font_03_sfnt_off00015e6d.bin
82d7becf744b5316d55c043d04f42f12693c49c55262714e0a2c8b476653e541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6D 7028 bytes

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