Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1063b4322f97168…

MALICIOUS

PDF

55.1 KB Created: 2020-08-25 08:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e97da977de3bde191f87ed81a5f29dba SHA-1: d7150fdf2e4925a85287c90427a316daaaf11859 SHA-256: c1063b4322f97168d854c0e91272645092097519c393992bdd5001210abf6abb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=formaciones+boca+river+para+hoy'. This URL is presented within the document body, suggesting a social engineering lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO manipulation or to obscure the true malicious destination. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the payload.

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/pify?keyword=formaciones+boca+river+para+hoy
    • http://kaxonoro.francais.brainintegration.net/uploads/1/3/0/7/130739163/gobin.pdf
    • https://cdn.shopify.com/s/files/1/0432/5854/4292/files/book_review_format.pdf
    • https://cdn.shopify.com/s/files/1/0446/7281/1171/files/24335666451.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4708/files/tumblr_color_text.pdf
    • https://cdn.shopify.com/s/files/1/0438/5370/9472/files/maria_montessori_books_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/9713/6030/files/letters_of_the_alphabet_with_pictures_and_words.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76102764406.pdf
    • https://cdn.shopify.com/s/files/1/0437/9557/9029/files/poser_pro_11_content.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1272/files/borland_turbo_c_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/nijabitaponagi.pdf
    • https://cdn.shopify.com/s/files/1/0438/9873/2696/files/tuzifuxiporapojikuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/0020/9319/files/mexixogazug.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/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074e3.bin
49621755f08d83bb119d6d4544ddf918d9cdd881d2dc453e1ee9f2dc738e0174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74E3 5400 bytes
font_01_sfnt_off000086da.bin
9159c3bbe4e617fc6ab21800076b31c718e0e83db4142b903295bba04c9b58a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86DA 6340 bytes
font_02_sfnt_off00009666.bin
03d648ab5bfaccccfddc668504096545013c03dd56591b7cc6cd1cfd447965a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9666 7748 bytes
font_03_sfnt_off0000aa18.bin
00880edd7d20fe2b81bf89ccfd1a7a0a63d2ae4981c87d0a05e8c6cb79cb3857		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA18 10868 bytes

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