Malicious PDF — malware analysis report

Static analysis result for SHA-256 093a17d5164ebcc6…

MALICIOUS

PDF

54.2 KB Created: 2020-08-29 00:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af2bd29292d86126d1b7cd18789d7732 SHA-1: 7ab9ca097609fde858ace30a01e00b12a3e4e64d SHA-256: 093a17d5164ebcc644b9fee398eb02d5f599642e70b75bccab5d4a1ab7d33681
154 Risk Score

Malware Insights

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

The PDF document contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous links, including one pointing to a known redirector, suggests an attempt to direct users to potentially harmful websites, likely for phishing or scam purposes.

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=eso+cradle+of+shadows+vet+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_868d8264d78d4aec8feb2fc91f93e382.pdf
    • https://static.usrfiles.com/ugd/b8c837_94d737e33f0c49ab891b59d4908e537d.pdf
    • https://static.usrfiles.com/ugd/b8c837_0efd68cc3fe24744b35c38ce4ea5545d.pdf
    • https://static.usrfiles.com/ugd/b8c837_38281d21d2b74252840743180cf1cba7.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/53133741347.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/22163152954.pdf
    • https://cdn.shopify.com/s/files/1/0440/8927/8616/files/diranofal.pdf
    • https://cdn.shopify.com/s/files/1/0430/9850/5377/files/xatuzuje.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/63622638990.pdf
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/66341541278.pdf
    • https://cdn.shopify.com/s/files/1/0434/4437/1613/files/destiny_2_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9328/files/watuwotinizusawipo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/broadcaster_pro_amigo.pdf
    • https://cdn.shopify.com/s/files/1/0439/0292/7003/files/android_10_huawei_p9_lite.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/eight_days_a_week_chords.pdf
    • https://cdn.shopify.com/s/files/1/0431/1246/4550/files/ammonification_and_nitrification.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/84496766222.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/40040581798.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/2008_vw_passat_owners_manual_downloa.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_off000094d6.bin
dd1e13f8e124e68fe32b54188318f43e9a99eb721f7e6e43226962d4bc9a04db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94D6 5392 bytes
font_01_sfnt_off0000a73f.bin
10efc74d3024b1a1a88142e5211630e8fed1c531fba73c6eba030ea9f62306b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA73F 10624 bytes

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