Malicious PDF — malware analysis report

Static analysis result for SHA-256 65739e00281cd26a…

MALICIOUS

PDF

48.7 KB Created: 2020-09-01 01:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a99ca6cf57b8a4edcb53e722736fd0fe SHA-1: b2c3543697bb47f71bfd0a5ecdf0cc2d7850bcc6 SHA-256: 65739e00281cd26a19d30feab4d98ab945cf44c6740ddadc834af05203a98418
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 firing indicating it's a malicious redirector. The primary malicious URL, 'https://ttraff.ru/wix?keyword=bollywood+video+songs+hd+1080p', is likely used to funnel victims to further malicious content. The document body itself contains garbled text but includes the malicious URL and several other Shopify-hosted PDF links, suggesting a link farm or SEO poisoning tactic to attract clicks.

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.ru/wix?keyword=bollywood+video+songs+hd+1080p
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/1843/5229/files/cast_of_magic_city.pdf
    • https://cdn.shopify.com/s/files/1/0430/8323/5489/files/nulitat.pdf
    • https://cdn.shopify.com/s/files/1/0460/1633/1943/files/web_browser_terbaik_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/performance_review_comments_by_employee_examples.pdf
    • https://cdn.shopify.com/s/files/1/0462/6746/5890/files/beatles_medley_sheet_music.pdf
    • https://static.usrfiles.com/ugd/df4650_00acc0a30b3f475bb74cdb3e9fd07c40.pdf
    • https://static.usrfiles.com/ugd/d5d855_848c35107ab447bfa3a05884d29b9903.pdf
    • https://static.usrfiles.com/ugd/defcb2_7f30d95dbc3f46409b00ab659b3a31d7.pdf
    • https://static.usrfiles.com/ugd/3aee12_40bf3a9aec8d426ba5c5762dd20facda.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/tidumup.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1860/files/gazefetenijuforupo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/mail_server_configuration_in_linux_step_by_step_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0433/7991/6967/files/gta_5_download_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/2182/7222/files/best_video_converter_for_mac_free.pdf
    • https://static.usrfiles.com/ugd/0e2875_aa902443274a4ccdbd42e32bf2599122.pdf
    • https://static.usrfiles.com/ugd/4117a9_7c49517605b24cfb8145a9bfb779f6a8.pdf
    • https://static.usrfiles.com/ugd/f967ac_7a7bca61192f412fbfac566e6c76464b.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_off00007260.bin
5b04d3922ab0b8f6f1937f613c535f2530837e86cd3790581316a626fa2021a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7260 5312 bytes
font_01_sfnt_off00008486.bin
3782d94e53b48a751f8770d4e3361ff663cb2ddb810338b4753886290f9be6dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8486 10352 bytes
font_02_sfnt_off0000a802.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA802 4324 bytes

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