Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ee2104358fbd48…

MALICIOUS

PDF

58.6 KB Created: 2020-08-30 19:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 320da603e4c470167f09fad3f2ecb3e1 SHA-1: b35fa935ba6fd2a78701fd01396bb0a3c8002c25 SHA-256: 14ee2104358fbd48f190b9b4138c49a238534d48012c9a2fe3e675e0ba5f6ace
162 Risk Score

Malware Insights

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

The PDF contains a link farm with a primary malicious redirector URL, disguised as a comic template. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests an attempt to distribute further content or lead users to malicious sites. No scripts were extracted, but the document body and heuristics point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/wix?keyword=comic+template+indesign
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/2718/3269/files/calendario_rusia_2020_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0433/8991/1196/files/dalutubowumetogesov.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/principles_of_criminal_law_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2442/4853/files/12313177461.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/wedefiporufesejizefelosu.pdf
    • https://cdn.shopify.com/s/files/1/0453/9875/3448/files/bernal_daz_del_castillo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/20187310125.pdf
    • https://cdn.shopify.com/s/files/1/0434/4263/4917/files/you_and_i_john_legend_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0433/4095/5803/files/nozofodogarizapadu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/59918318625.pdf
    • https://static.usrfiles.com/ugd/b5472a_d3d3d6e7139d47ddb1b00b12ecb4a582.pdf
    • https://static.usrfiles.com/ugd/52b593_93d1ce6467554c87a7ec3415903bddad.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_off0000916f.bin
82a292e2ef950faf96ae37f73437b29830f6d4f30d8ed4a83c6d6110aeaa7eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x916F 5108 bytes
font_01_sfnt_off0000a2b0.bin
b30783dc0a820f331026b3b596b05568827734fa830b674b2f3e327875304646		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2B0 14232 bytes
font_02_sfnt_off0000cf64.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF64 4324 bytes

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