Malicious PDF — malware analysis report

Static analysis result for SHA-256 0276c95fab41f24e…

MALICIOUS

PDF

43.0 KB Created: 2020-08-04 22:45:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 069bacb580b83ce0745c5ec9e5686b2c SHA-1: 6455c6c5affd99af0bfd0866b68510507fa7a1f5 SHA-256: 0276c95fab41f24e6e9cb4e881a66165ec353c0a0b7a56f3760a9ccfe956dba7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm designed to mimic search results for a novel, directing users to a malicious redirector. This redirector then likely leads to further malicious content or downloads. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links supports a malicious intent to distribute further content.

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=asamardhuni+jeeva+yatra+novel+pdf+download
    • http://files.jasondozierphotography.com/uploads/1/3/1/3/131379443/giveza.pdf
    • http://files.chrishhphotography.com/uploads/1/3/1/6/131606876/jozud.pdf
    • http://files.stjohnhillchurch.org/uploads/1/3/0/8/130873875/jubumemuxibafun-rinerubifiboxa-bifuwefutojewe-wixixuzikodolo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4956/6886/files/18009209739.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/47098153864.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0436/6876/6873/files/milujufalovomonipavi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdf
    • https://cdn.shopify.com/s/files/1/0447/9614/9921/files/anatomy_of_heart_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/3262/5831/files/nalen.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/51698153242.pdf
    • https://cdn.shopify.com/s/files/1/0429/0733/6867/files/eclipse_c_ide.pdf
    • https://cdn.shopify.com/s/files/1/0428/5507/1900/files/nissan_almera_tino_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/2916/8282/files/27164322920.pdf
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/31830099832.pdf
    • https://cdn.shopify.com/s/files/1/0431/1603/6257/files/97286288836.pdf
    • https://cdn.shopify.com/s/files/1/0437/0753/1432/files/24177757627.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ef.bin
43adf357e5cdb84a85f8a7bad2edc46f5ec2e8ba6e37c70a900a8ce88670df81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68EF 5600 bytes
font_01_sfnt_off00007bed.bin
06334e1134303d751db95aa8c1b757077fe5bdac452c90d8ef80784937e4b139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BED 10104 bytes

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