Malicious PDF — malware analysis report

Static analysis result for SHA-256 029bd8fff1b34026…

MALICIOUS

PDF

53.4 KB Created: 2020-08-11 00:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26260c5b3fcd3902bbab267a07a7f544 SHA-1: 7c73b5d8a9431811de62eb29568ead36af5eb0dc SHA-256: 029bd8fff1b340260c0cc5665846187224cc26460c18f9aec7716e7d1c9407d5
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 external resources. One of these links, 'https://ttraff.ru/pify?keyword=asamblea+general+de+la+onu+pdf', is identified as a known malicious redirector. The document body also contains this URL, suggesting an attempt to lure users to malicious infrastructure. No scripts were extracted, but the presence of numerous links and the identified malicious redirector strongly indicate a phishing or redirection attack.

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.ru/pify?keyword=asamblea+general+de+la+onu+pdf
    • http://files.madlyeclectic.com/uploads/1/3/1/4/131483253/nuwitoduku_xafozovininu_lekilirox_navagad.pdf
    • http://files.ewbttu.org/uploads/1/3/1/0/131070711/jujomamikutew_guvate_dejupawo.pdf
    • http://files.fabriccreationsbyandrea.com/uploads/1/3/1/3/131398113/c2cfab9.pdf
    • http://files.lecharmantarts.com/uploads/1/3/0/8/130813612/5e681980b9e.pdf
    • http://mifozisuf.turkeytimesports.com/uploads/1/3/2/8/132814930/xemuzovepe-gujugoxizoxakug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/85771034780.pdf
    • https://cdn.shopify.com/s/files/1/0430/0773/8019/files/35587525131.pdf
    • https://cdn.shopify.com/s/files/1/0435/6400/7583/files/albertina_sisulu_biography.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bagubiginapir.pdf
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/pojebikuziramuxitabatod.pdf
    • https://cdn.shopify.com/s/files/1/0433/7722/9982/files/vufefip.pdf
    • https://cdn.shopify.com/s/files/1/0429/4498/7292/files/difficult_equivalent_resistance_problems.pdf
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/calvin_harris_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0433/9312/2460/files/97136184024.pdf
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/binojuxifisokez.pdf
    • https://cdn.shopify.com/s/files/1/0428/3593/5388/files/16698953611.pdf
    • https://cdn.shopify.com/s/files/1/0429/3751/6191/files/isotropic_elasticity.pdf
    • https://cdn.shopify.com/s/files/1/0430/1560/2339/files/67165052418.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c00.bin
9b2debf88d71099ed3c6d9b5088feef04cdf4ff0db483d3dbc9876da2bc5f179		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C00 3544 bytes
font_01_sfnt_off000078a8.bin
e2a84bfba258b9a3e27661af5657346a068f9238f5f09ab8a30d71a3421c0a3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A8 5492 bytes
font_02_sfnt_off00008b31.bin
ccc7f389a44f87b2fafe6c536fb8d91c8417c8cb9cccdae5a17d03d4349c4ec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B31 11064 bytes
font_03_sfnt_off0000af5b.bin
f1b256acc6a4e5b8bd189edc211ad3bac587d2a48f724db3502511e56a915cbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF5B 16560 bytes

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