Malicious PDF — malware analysis report

Static analysis result for SHA-256 461a183d0145ea08…

MALICIOUS

PDF

47.6 KB Created: 2020-08-31 03:26:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c920bfc991614b72a72e920db2fa28d8 SHA-1: 94dd2eb1c921c4602d695e74e8c574e65e058262 SHA-256: 461a183d0145ea0895ad683d9b0c7a68401b1a8003a5fdc46247ce9601f74049
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to a known malicious redirector. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.ru/wix?keyword=sore+wa+chiisana+hikari+no+youna, which is likely used to redirect users to further malicious content. The document body itself contains garbled text and some of the extracted URLs, reinforcing the malicious intent.

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=sore+wa+chiisana+hikari+no+youna
    • https://static.usrfiles.com/ugd/96768c_d8106d2fc6324fde9f81c9045bcd89a4.pdf
    • https://static.usrfiles.com/ugd/b65acf_93b8bc94faa846b8b17ceed2d18836f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_2e8a88e7e51e4582ac51e7d219dc9ab9.pdf
    • https://static.usrfiles.com/ugd/764aaa_98c86dfe250349f4bc86dc279235752a.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_40fd01c387194e3298f3b32cee943685.pdf
    • https://static.usrfiles.com/ugd/b8c837_614751c2c7a24e25bbcebab14ffa3923.pdf
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/balakrishna_audio_songs_naa_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/gsm_and_cdma_technology.pdf
    • https://cdn.shopify.com/s/files/1/0437/3869/3797/files/25205741184.pdf
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/linksys_wrt_160n_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7238/files/96732774499.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0ea56c7aa4146cd89f05fe9798ac2d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_172efa5ee21f4ac49c4e42bfffa82872.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059f8.bin
f45d25ab66e1a0831437f9d28ad26fc0a71008648a9657885bcfacf47270fc7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F8 5216 bytes
font_01_sfnt_off00006bb8.bin
bfb7a29e87dba9b6dba60bcb3c9cbb30cac1a1ab7273a34c07e8f591cf09aed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB8 14976 bytes
font_02_sfnt_off00009a55.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A55 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.