Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a7aa51acbe8e58…

MALICIOUS

PDF

60.6 KB Created: 2020-09-01 13:51:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ead5ef2ef2d970b057ce4500f88c8568 SHA-1: af32b6e1c86207845154216c80b24e5b467b2728 SHA-256: 14a7aa51acbe8e581cc0602604dee00e6074eb12f975f3c7d119abe2a039e1a7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body and embedded links suggest an attempt to disguise malicious activity under the guise of providing information, potentially for SEO manipulation or to trick users into clicking malicious links. No scripts were extracted, but the presence of malicious links indicates a phishing or redirection attempt.

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=snake+gourd+recipe+in+tamil+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/429b25_cbcc8c4d628e42c3ab6237242d3dd998.pdf
    • https://static.usrfiles.com/ugd/1f2646_daf59daeb7994367b85f6aaf9c2e1acd.pdf
    • https://static.usrfiles.com/ugd/d5d855_752a06ed6eb546529a63dc729cbe571b.pdf
    • https://static.usrfiles.com/ugd/529dbf_52f1968c9f5e4a8d9961ab0de5721ea7.pdf
    • https://static.usrfiles.com/ugd/8cbfce_b41cca1fb1a44e6689f9c8abc79c9579.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/ashab_e_kahf_book_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6504/8214/files/gamilak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mozesuseb.pdf
    • https://cdn.shopify.com/s/files/1/0432/4104/6171/files/dclaration_de_cession_de_vhicule.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9764/files/20750118890.pdf
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/ahmed_khan_malang_audio_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/fedukizatigebufu.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/temadevimi.pdf
    • https://cdn.shopify.com/s/files/1/0441/0654/7352/files/taking_back_sunday_albums.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/xexigotigebasureliporujod.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006cc0.bin
a0845f7039831d66ec2fdebef5ccea571675ffbcc92056efdc018c4e8aefe067		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC0 5344 bytes
font_01_sfnt_off00007ed3.bin
526e4bbcb1f4c72f317b0ab4434bec118ba95daf07f2972ad35c7edd09295276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED3 11424 bytes
font_02_sfnt_off00009cc2.bin
c6110f30eae943dd92ddd3eb6fec26029bd9be97027b324475d54cd2d6702850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC2 10752 bytes
font_03_sfnt_off0000c101.bin
3745d395dffe053ce12bb6e6d543a89fda750690c61e1e786fb35984b58e44e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC101 16344 bytes
font_04_sfnt_off0000d67a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD67A 4324 bytes

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