Malicious PDF — malware analysis report

Static analysis result for SHA-256 770c2a078c067357…

MALICIOUS

PDF

43.4 KB Created: 2020-08-29 17:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ef7c093838dfef23134d355d4b3f39a SHA-1: 68e4e7ed1fb71974976d2931a769e5be4ebcfdf2 SHA-256: 770c2a078c0673576704f2a353a49a2358220f2fe0f3fbf3132c6b47509008df
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 26 external PDF links, one of which is a known malicious redirector. The document body contains the text 'Seenugadi love story songs free download' and a URL that redirects to a malicious domain, suggesting a lure for potentially unwanted content or malware. The ML classifier strongly flagged this PDF as malicious.

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=seenugadi+love+story+songs+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/aprender_aleman_desde_cero.pdf
    • https://cdn.shopify.com/s/files/1/0446/6976/3747/files/99233584569.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/lojezirepusenunafimojibo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/wixagavixerut.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/algebra_and_trigonometry_sheldon_axler.pdf
    • https://cdn.shopify.com/s/files/1/0437/8846/8376/files/tewire.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/33498561749.pdf
    • https://cdn.shopify.com/s/files/1/0431/0836/8545/files/raft_wars_3_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/lofujojuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/1117/7629/files/worksheets_activities_rime_of_the_ancient_mariner.pdf
    • https://cdn.shopify.com/s/files/1/0462/4174/2997/files/22412462638.pdf
    • https://cdn.shopify.com/s/files/1/0433/4944/2715/files/lil_peepz_character_creator.pdf
    • https://cdn.shopify.com/s/files/1/0438/6222/9157/files/toyota_carina_e_service_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052cd.bin
63bef24ba57b18207909591873736d186760bea7d5f346b1bf7c986467f15be5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52CD 5312 bytes
font_01_sfnt_off000064f9.bin
9979775f031def5fc74f4b620ee9511d643ac179620cba3d9e4c731478f27191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F9 2168 bytes
font_02_sfnt_off00006f49.bin
93aaebc0132cffa321e9f4a68a85c8261e5d66dd09a6867846f461d6eb8ce573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F49 10324 bytes
font_03_sfnt_off0000925a.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x925A 4324 bytes

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