Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7fab281ba1603f…

MALICIOUS

PDF

48.8 KB Created: 2020-08-31 04:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42c4b323d904ae1252c369e89f37db21 SHA-1: d845f8e05cd50ca04778c1f92c49a4221fd53f1f SHA-256: 6a7fab281ba1603f3ae97b65188248ca4982e63d8f08dde2aee88c2f72673372
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=aod+apk+para+s6', which is flagged as malicious. The presence of a large number of external PDF links suggests an attempt to direct users to potentially harmful content or phishing sites.

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/wix?keyword=aod+apk+para+s6
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_ba81411a5788433eb5a317c500da141c.pdf
    • https://static.usrfiles.com/ugd/b8c837_4c523a31869c47538eeaff3ab465aa72.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f92c65d7a024e6a8718f26566f71acb.pdf
    • https://static.usrfiles.com/ugd/16a96a_810ed761f4744e1ab1125388dab1f7ea.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2384/files/sand_balls_mod_apk_revdl.pdf
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/52445228540.pdf
    • https://cdn.shopify.com/s/files/1/0431/4228/3432/files/mawoxotapumutaxij.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/gixinezerizotojiziluwu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/26193490117.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f3cd09ffc994c1f9ca8a27c62383c76.pdf
    • https://static.usrfiles.com/ugd/5926b4_e49b093a16194aa4b7852ed277affb61.pdf
    • https://static.usrfiles.com/ugd/9e53d4_c0ec85642a5446f2824b900abce39f19.pdf
    • https://static.usrfiles.com/ugd/63022f_609363e0586a4a41b5f4b7971dbc2908.pdf
    • https://static.usrfiles.com/ugd/d99ef3_e606af4274ab493e8b7150f0bf5cfdce.pdf
    • https://cdn.shopify.com/s/files/1/0438/3454/0192/files/cartoon_network_anything_pc.pdf
    • https://cdn.shopify.com/s/files/1/0435/8144/0168/files/49926696090.pdf
    • https://cdn.shopify.com/s/files/1/0427/3248/6823/files/wabilejalarixagowepav.pdf
    • https://cdn.shopify.com/s/files/1/0430/5669/3397/files/28134495245.pdf
    • https://cdn.shopify.com/s/files/1/0436/9829/0856/files/45920903212.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_off0000694c.bin
d9f577ed7cb3832aac6bb7fcffc385ca754d17d64ab4bb95250b12b1184b8806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694C 5128 bytes
font_01_sfnt_off00007acd.bin
7632cde06bd5993f7da041ed8353e14c313e146ae66f82e8b3b6b05426a8bfcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACD 11328 bytes
font_02_sfnt_off0000a0fa.bin
5f2fb6b63b11c0f405b30550d1bb30e3cb20605032478e776a25b6c4b21d25c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0FA 16080 bytes

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