Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e37285e58c7179b…

MALICIOUS

PDF

38.6 KB Created: 2020-08-29 20:09:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4ff90525ffdc38cee15037c11e7399a SHA-1: 5ebe063f6ba75341479fedeb40e1064f80dc6d60 SHA-256: 6e37285e58c7179b8ea18f04aa9abba6a616cda97105d8e2c13c7efd0b1b1160
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.me/wix?keyword=samsung+smartcam+setup+password', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Samsung smartcam setup password', suggesting a lure to trick users into clicking the malicious link. 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.me/wix?keyword=samsung+smartcam+setup+password
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_71cc51fe7ccf40d29fa2798be78cc959.pdf
    • https://static.usrfiles.com/ugd/b8c837_03fabe0c4f734b85b60c8473cbeac064.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_0ef4909695464b0ca517ba12087376da.pdf
    • https://static.usrfiles.com/ugd/b8c837_c2ab82886b6241e5a85cbe95942d2347.pdf
    • https://static.usrfiles.com/ugd/b8c837_258a96fa30bd41219800a6511a5ec1bc.pdf
    • https://cdn.shopify.com/s/files/1/0431/4926/3005/files/4467597383.pdf
    • https://cdn.shopify.com/s/files/1/0463/7717/3147/files/4905967905.pdf
    • https://cdn.shopify.com/s/files/1/0450/9502/6840/files/administrao_pblica_paludo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6051/7274/files/sisajonuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/1332/2398/files/kujaka.pdf
    • https://cdn.shopify.com/s/files/1/0463/2444/9437/files/avidemux_for_windows_7_32_bit.pdf
    • https://cdn.shopify.com/s/files/1/0437/8217/6920/files/sufavuzizenitigem.pdf
    • https://cdn.shopify.com/s/files/1/0437/4803/2666/files/98913369282.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_off0000582b.bin
461560b959189124efaef0ff256071049b378860a9bd51b85a1c884068036acf
pdf-font-stream PDF embedded font (sfnt) at offset 0x582B 5556 bytes
font_01_sfnt_off00006afd.bin
17fe40b83224e684a9a05483e11803dc5e17e6b401b574c3da308e49add05a83
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AFD 10480 bytes