Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb27326313766174…

MALICIOUS

PDF

45.7 KB Created: 2020-10-27 17:46:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8188587dc80159475ede4ec66932db4 SHA-1: 12534bff11e5f9728b11bbd5c7c86b8306d7acc7 SHA-256: cb27326313766174b5d320ce88b028eec0c0996d6e8f3b7eaf8082d503e08d19
154 Risk Score

Malware Insights

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

This PDF document contains numerous links, including one pointing to a known malicious redirector at `ttraff.com`. The document body, though heavily obfuscated, contains the URL `https://ttraff.com/123?keyword=slush+puppie+machine+manual`, suggesting a lure to a malicious site. The presence of a large number of external links, many pointing to benign-looking PDFs on cloud storage, indicates a link farm or SEO poisoning tactic to improve search engine ranking for the malicious URL.

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/123?keyword=slush+puppie+machine+manual
    • https://porujigiwafixuf.weebly.com/uploads/1/3/4/3/134373975/jaxokaliwid.pdf
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/a511afb7e827751.pdf
    • https://cdn-cms.f-static.net/uploads/4374686/normal_5f8ed3ae62901.pdf
    • https://cdn-cms.f-static.net/uploads/4401983/normal_5f922a64e9b16.pdf
    • https://cdn-cms.f-static.net/uploads/4391623/normal_5f93960cc28c7.pdf
    • https://cdn-cms.f-static.net/uploads/4375521/normal_5f90a99338028.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/942f9e61-6813-4e56-9d34-13e8d347a418/ge_cl3_universal_remote_instructions.pdf
    • https://uploads.strikinglycdn.com/files/90e39beb-893e-40dd-af81-16cd835aa43f/8552070136.pdf
    • https://uploads.strikinglycdn.com/files/f51f6672-f5f4-44e6-b39a-06d24e2da830/27158071823.pdf
    • https://s3.amazonaws.com/memul/77629996853.pdf
    • https://s3.amazonaws.com/sugaguxagu/jezajexubewinesesam.pdf
    • https://s3.amazonaws.com/batoragubukepo/49090029761.pdf
    • https://s3.amazonaws.com/kavitokolezub/prism_spectrometer_experiment.pdf
    • https://s3.amazonaws.com/zirojopemup/73958066174.pdf
    • https://cdn.shopify.com/s/files/1/0480/8179/7284/files/lactogenesis_y_lactopoyesis.pdf
    • https://cdn.shopify.com/s/files/1/0431/9477/7757/files/brain_teasers_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0501/3841/5269/files/kanewefuw.pdf
    • https://cdn.shopify.com/s/files/1/0501/8432/3252/files/catalog_avon_c15_2020.pdf
    • https://cdn.shopify.com/s/files/1/0495/7850/8440/files/13_more_days_in_hell_silver_games.pdf
    • https://cdn.shopify.com/s/files/1/0431/4578/9606/files/nintendo_wii_bundle_packages.pdf
    • https://cdn.shopify.com/s/files/1/0482/6179/1905/files/amarakosha_free_download.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_off00006771.bin
ff60ac0989194c6757e5d12fbea6d317eae3de921df792c5b9d677643302d1e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6771 4872 bytes
font_01_sfnt_off000077ca.bin
708e0a53fae5a2f3e945b922645ff89465e64cec5e76c391d976d3303aad12bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77CA 10592 bytes
font_02_sfnt_off00009baf.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BAF 4324 bytes

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