Malicious PDF — malware analysis report

Static analysis result for SHA-256 66809a75cd71d627…

MALICIOUS

PDF

44.4 KB Created: 2020-09-04 23:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 719bebc9b11a01f357e87a44ca5f7b7b SHA-1: 22356c381982826cae0530ac0c05b4193a1452a6 SHA-256: 66809a75cd71d6277a87126f1cc20c185f3814e83c3ae6ab144105413cfb045c
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text and URLs that suggest a lure related to 'amazing grace children's book pdf'. The primary malicious URL identified is https://ttraff.me/wix?keyword=amazing+grace+children%2527+s+book+pdf, which is likely used to redirect the user to a malicious site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=amazing+grace+children%2527+s+book+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/1cc777_9dc23c4d62ad4a63b8d43ad46cef6a52.pdf
    • https://static.usrfiles.com/ugd/f8de3e_cf9ae82ab2b84c8393def0bfef0a98b4.pdf
    • https://static.usrfiles.com/ugd/c79b1c_f3a677a403e84bc8987ce8a1f72ffd34.pdf
    • https://cdn.shopify.com/s/files/1/0427/7462/6470/files/rarest_avon_bottles.pdf
    • https://cdn.shopify.com/s/files/1/0457/6680/3622/files/mind_map_template.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/tonuvu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/academic_research_proposal_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/sujet_brevet_franais_washington_2020.pdf
    • https://cdn.shopify.com/s/files/1/0435/4650/9461/files/how_mnay_liters_in_a_gallon.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/26786933026.pdf
    • https://cdn.shopify.com/s/files/1/0463/3772/0476/files/wiseguy_voice_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9263/files/sunetirelulikelomawoletim.pdf
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/12215387346.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f83.bin
a005341b0f6639a6bf14e9ec85de631f328f8daba16a881462be0bea8f89e80e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 5556 bytes
font_01_sfnt_off00007226.bin
057ee1a8bdcf1329bf632ccd3d7695f7fb5ef327263b4858d1755e06c66c4e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7226 10820 bytes
font_02_sfnt_off000096d7.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96D7 4324 bytes

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