Malicious PDF — malware analysis report

Static analysis result for SHA-256 7136173b99af7d86…

MALICIOUS

PDF

50.0 KB Created: 2020-08-29 01:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fa276b91c2caf48f8bdebc6bca866e9 SHA-1: e71493743bcd87bd476d8426dead8bfc199878c8 SHA-256: 7136173b99af7d8602eded1ea26d6e2ca3a059838b8178305d81d8c6f7dff550
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. One such link, 'https://ttraff.com/wix?keyword=pokemon+ranch+wii+wad', is flagged as malicious. The document body, though heavily obfuscated, appears to contain references to the redirector URL. The presence of many links to external PDFs, including benign ones on Shopify, suggests an attempt to disguise malicious activity within a seemingly legitimate link farm.

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/wix?keyword=pokemon+ranch+wii+wad
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5917/3790/files/dark_souls_dragon_greatsword.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/4979302310.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/55059950679.pdf
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/lezesavux.pdf
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/zizebukogewenepu.pdf
    • https://static.usrfiles.com/ugd/b8c837_35130c0df6dd4341b1707073b8656f67.pdf
    • https://static.usrfiles.com/ugd/b8c837_8986a352d3e34bfaa42be1ba92de6605.pdf
    • https://static.usrfiles.com/ugd/b8c837_68d82d63751d4673a654b89ed94a7141.pdf
    • https://static.usrfiles.com/ugd/b8c837_89a4ea3ff8a14ee09f582ce94b139d16.pdf
    • https://static.usrfiles.com/ugd/b8c837_7943355ef603443b9928849a2c7c9bdf.pdf
    • https://cdn.shopify.com/s/files/1/0434/2513/6792/files/51590730735.pdf
    • https://cdn.shopify.com/s/files/1/0428/8711/9007/files/92246837229.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9874/files/valiant_thor_libro.pdf
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/wijanoxuzak.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/alternator_service_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_1d00b330d89e41bbb84a22664eb146c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_22a277fea62c494f8fa2f190366ff8c7.pdf
    • https://static.usrfiles.com/ugd/b8c837_fc1238428dcf4ae9b46b6b07ae68358b.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_off0000861e.bin
490d54bf14bafe337b71a043901c918d8d4bcffccd68ddbd909105cc33100c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x861E 5128 bytes
font_01_sfnt_off0000976b.bin
5d232933b0261adc9cbc716fc19cef33d46f4417b265abff5d9b91064094c823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x976B 10424 bytes

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