Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c45f1a7e319efc1…

MALICIOUS

PDF

45.5 KB Created: 2020-08-29 19:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed339c1a61b670051fc840178276ed0a SHA-1: 5cb3ac4252cfa0e0a5e6c4fafba5ffb86650f00a SHA-256: 6c45f1a7e319efc15f37c60875d53054cccebc35e67b4e6c0c8758795c8c5e72
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.cc, which is likely used to obscure the final destination and potentially perform further malicious actions. The document body, though heavily obfuscated, contains the same URL and a title suggesting a lure. The presence of numerous other PDF links, many pointing to benign content, suggests a link farm or SEO poisoning tactic to increase visibility of the malicious link. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.cc/wix?keyword=how+to+learn+enochian
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_d9df642da5774e1194a80f0934fb8a8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_31e591a6907047dc93217a5834b16001.pdf
    • https://static.usrfiles.com/ugd/b8c837_1259ee260f034bf587892fdf773500c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_73a997d589bb4aad9a06a1fbfdf871ed.pdf
    • https://static.usrfiles.com/ugd/b8c837_01d9be52db3f48eb85dce203f68a2ad5.pdf
    • https://cdn.shopify.com/s/files/1/0432/6798/1476/files/44415883139.pdf
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/netbeans_javafx_platform.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/el_negocio_de_bienes_races_en_mxico.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/lotixasinu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/go_math_accelerated_grade_7.pdf
    • https://cdn.shopify.com/s/files/1/0437/1457/6537/files/nowozesugekemuwenisigur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9167/3763/files/33298472391.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_off00006523.bin
a1a04c61ebb314a79ecf5b70897da17fc0a43f48b93f27824576eb3d70187571		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6523 4552 bytes
font_01_sfnt_off0000748d.bin
144a462afb060e09df026dda26f55b35cf9eb8fc5dc0845ca307c09d90d0a116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x748D 11680 bytes
font_02_sfnt_off00009b66.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B66 4324 bytes

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