Malicious PDF — malware analysis report

Static analysis result for SHA-256 1619bed9740d0294…

MALICIOUS

PDF

72.6 KB Created: 2020-08-31 08:14:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9f8372f6119d75c650a96b337fea548 SHA-1: 7b85dcca2fd9e8ba474753233840b5802d424805 SHA-256: 1619bed9740d029416b49bb5f790cae02f85582b36dc78acda7d1f053bb2a9e9
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, a common tactic for SEO link farms or phishing campaigns. One of the embedded URLs, 'https://ttraff.com/wix?keyword=general+grievous+before+cyborg', is flagged as a known malicious redirector. While no scripts were extracted, the presence of numerous links and the malicious redirector strongly suggests an intent to redirect users to harmful content, likely as part of a phishing or malware distribution scheme.

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=general+grievous+before+cyborg
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_c51e1c9b1d3b42b285be0c176583e626.pdf
    • https://static.usrfiles.com/ugd/43d598_1a4d5e394dae43eba953ffdb0b7c7970.pdf
    • https://static.usrfiles.com/ugd/197ed4_418a1d5d92604140997856ff1dc8eed7.pdf
    • https://static.usrfiles.com/ugd/b8c837_ae1a318ed707480780e7c1d766f775bb.pdf
    • https://cdn.shopify.com/s/files/1/0429/3967/8886/files/keto_menu_plan_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/11046760066.pdf
    • https://cdn.shopify.com/s/files/1/0432/8177/6795/files/bit_by_bit.pdf
    • https://cdn.shopify.com/s/files/1/0464/5057/3480/files/merriam-_webster_s_arabic-_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/jukaneleteves.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/kidney_function_analysis_report_card.pdf
    • https://cdn.shopify.com/s/files/1/0437/0703/9912/files/rujuziwanuwulelexenil.pdf
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/dushman_old_movie.pdf
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/26027800499.pdf
    • https://static.usrfiles.com/ugd/b8c837_396a42f591524d1b83156bef42351dca.pdf
    • https://static.usrfiles.com/ugd/b8c837_98fbcd487e8d4872953a609484692e11.pdf
    • https://static.usrfiles.com/ugd/1c90dc_373e109410e442eb8db3a8c6384d877c.pdf
    • https://static.usrfiles.com/ugd/b8c837_80b834759d2c4e9b943af6c63b8f4b64.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_off0000b634.bin
e1ea96d7bdc132bf050e4178e224ea4497ef0b8f50033c9de9059b28fe0c4b56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB634 5184 bytes
font_01_sfnt_off0000c7f4.bin
09f7b78133a01c18970b088ceb41276847b5ca754993f40b67fcece8d0f7de04		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F4 9908 bytes
font_02_sfnt_off0000ea16.bin
0f93fcf7e61ad709cde06366b519d9b5e2dd165dbc2b3a9da0810733451f714f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA16 18620 bytes
font_03_sfnt_off00010729.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10729 4324 bytes

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