Malicious PDF — malware analysis report

Static analysis result for SHA-256 c396244c51d14504…

MALICIOUS

PDF

33.4 KB Created: 2020-08-25 05:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f71cd95d51cb788a5e1b9dab53dc0b5f SHA-1: 49b2fc0df91f5fe5e6e1c1fc85e5318baf136b56 SHA-256: c396244c51d14504840bd9127e83067c989a2486fa7fa3affa17da2789101d9b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'Age of Adaline full movie free' and the authoring application, indicating a lure to entice clicks on the malicious redirector.

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/pify?keyword=age+of+adaline+full+movie++free
    • http://nosir.witnesstalkradio.org/uploads/1/3/1/1/131163559/rorovale.pdf
    • http://wikobuv.golfeuropeexperience.com/uploads/1/3/1/4/131407815/xabitazen.pdf
    • http://files.ftfundraising.com/uploads/1/3/1/4/131453432/rolopidatajife.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/52586859235.pdf
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/dapenakewefixojajozegat.pdf
    • https://cdn.shopify.com/s/files/1/0432/9907/8304/files/barixijapa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/mozafowutifodukotanasiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/77695697634.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/abbyy_transformer_12_serial_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/befuxaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/miradakubopewow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38659434623.pdf
    • https://cdn.shopify.com/s/files/1/0437/8496/2200/files/zamogitiwigopik.pdf
    • https://cdn.shopify.com/s/files/1/0438/3404/8669/files/law_of_sines_and_cosines_applications_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/5646/3014/files/binary_options_candlestick_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2054/files/nginx_cache_control.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004503.bin
bd38a5378219321cec6fb156c824641512d42288971ecb52ef00dba3cbb4af8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4503 5100 bytes
font_01_sfnt_off00005647.bin
4716be23d8dac339ec76c31db7661ae8032db2918fb5851d61d7cad5ddd9c24e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5647 10268 bytes

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