Malicious PDF — malware analysis report

Static analysis result for SHA-256 cafdd98596a2e06f…

MALICIOUS

PDF

49.1 KB Created: 2020-08-08 16:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48991226e4b17d24e05f7d0f3086bf99 SHA-1: 59154973c681870cc707748a2669bc12ea9fd9c5 SHA-256: cafdd98596a2e06f464eddf8274928b316f9d2409136b3dae21822499a68f3d4
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with the primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL and appears to be generated by wkhtmltopdf, a tool often used to create SEO spam or phishing documents. The presence of numerous links to Shopify-hosted PDFs suggests an attempt to leverage legitimate platforms for link farming or to disguise malicious intent.

Heuristics 3

  • 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.
  • 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=que+es+un+antivalor+pdf
    • http://files.jannlphotography.com/uploads/1/3/1/4/131453365/8f86d8b12933.pdf
    • http://files.thegreybirch.com/uploads/1/3/1/0/131070374/7090648.pdf
    • http://takebum.pacific-solutions.com/uploads/1/3/0/7/130775129/tobijejofegedet.pdf
    • http://files.aprilsandersphd.com/uploads/1/3/1/4/131407705/somoj-pixinodi-jefalazufog.pdf
    • http://files.sierralovestowell.com/uploads/1/3/1/0/131071298/1f05af97.pdf
    • https://cdn.shopify.com/s/files/1/0437/6359/7473/files/contoh_putusan_arbitrase.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/problem_solving_method_of_teaching_science.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/ruvunekaxavofetuxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/90042170593.pdf
    • https://cdn.shopify.com/s/files/1/0435/1010/4228/files/22070173001.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/fovewonazebopejimowu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7484/files/definition_of_induced_abortion.pdf
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/bisetumabizexodebagoxuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/anna_and_the_french_kiss.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/nos_gba_2._6a.pdf
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/tabla_de_verbos_auxiliares_en_ingles.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_off00008091.bin
5c5795141ca4d44eb4e1f7f107c198dfc1fee3eb83e1f660f594c87f2874b28c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8091 5156 bytes
font_01_sfnt_off0000922f.bin
ca0cbf12cf1dcf15fdae713af36ae0f8dbd0ea27991634dcc6f3f9466135d326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x922F 11076 bytes

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