Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5955c31199939e…

MALICIOUS

PDF

39.7 KB Created: 2020-08-29 19:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d92d160d448a7df884a3a6fe31a2ac0 SHA-1: 6a0f9e415cf9cafdba5b529852d5cd365ae42c9d SHA-256: 7b5955c31199939ea29731427aefb000baaa5d197c7e2b9041b267853ffb0076
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 a link to known malicious redirector infrastructure at 'https://ttraff.com/wix?keyword=carson+horizontal+bookcase+threshold'. Another critical heuristic identified a large number of external PDF links, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

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=carson+horizontal+bookcase+threshold
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1087/3765/files/ielts_academic_reading_practice_test_ielts_fever.pdf
    • https://cdn.shopify.com/s/files/1/0430/9496/6436/files/fake_company_names_generator.pdf
    • https://cdn.shopify.com/s/files/1/0432/9691/5621/files/77558366424.pdf
    • https://cdn.shopify.com/s/files/1/0432/6483/5737/files/95291185660.pdf
    • https://cdn.shopify.com/s/files/1/0439/8071/8238/files/living_with_hipstergirl_and_gamergirl_porn.pdf
    • https://static.usrfiles.com/ugd/b8c837_946623de2c8d4ae1bfa3c9e658859ce4.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c5f60f4ae5f4bd284098d999c42e049.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_d1539213dab7443692a90315d41907fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_d4596a7deb9a4e2b80d4de45785102e6.pdf
    • https://static.usrfiles.com/ugd/05900a_b171d4be262f4580b1669cef4db5a0ab.pdf
    • https://cdn.shopify.com/s/files/1/0428/5225/3863/files/blockchain_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/82793248201.pdf
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/social_media_advertising_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0437/3364/7509/files/bepijofijunusurowatosix.pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/arrival_full_movie_download_moviescounter.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004806.bin
a3f6cc6393737e77527880ea305dc6540268470e790ce1f74067cf557f62b591		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4806 5184 bytes
font_01_sfnt_off0000599d.bin
34182427e5da32e08b6205bf9a688578d5ae3ab0f2fd38d20431fac584a35fc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x599D 9900 bytes
font_02_sfnt_off00007bb8.bin
a8f82ce1cdc57d6cf73caeb35ba0a534b8f114798d4dfc5d6ed82df03316e49d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB8 16384 bytes

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