Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43be6c37f3f15e1…

MALICIOUS

PDF

43.7 KB Created: 2020-08-14 18:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e055eea4b89cc4b2b1ad873fd58e968 SHA-1: 51d155307ca93e08aeb964642b26cb3dc637e98b SHA-256: e43be6c37f3f15e19f0023bed021e37813de7d47e0293145ccf146a78e47ffa4
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a URL designed to lure users with the promise of a 'pandora music mod apk'. This link is embedded within the document body, suggesting a social engineering attempt to drive traffic to malicious infrastructure. The presence of numerous other links, many hosted on Shopify, further indicates a link farm or SEO poisoning tactic to distribute the malicious 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=pandora+music+mod+apk
    • http://toson.remnantsofmagic.com/uploads/1/3/0/8/130874049/kevuzamodazasomizub.pdf
    • http://files.txstudentcivics.org/uploads/1/3/0/7/130775830/tomarumaridaw.pdf
    • http://zekutirad.happyvalleyanimalsinneed.com/uploads/1/3/2/6/132682883/3113792.pdf
    • https://cdn.shopify.com/s/files/1/0429/6507/4086/files/56396604571.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8440/files/advertising_management.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/neoliberalismo_peru.pdf
    • https://cdn.shopify.com/s/files/1/0432/4907/4336/files/85820232791.pdf
    • https://cdn.shopify.com/s/files/1/0429/2729/2582/files/vowet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4805/0586/files/role_of_artificial_intelligence_in_education.pdf
    • https://cdn.shopify.com/s/files/1/0429/5586/6263/files/uwc_online_application_form_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/6340/8795/files/aws_certified_solutions_architect_study_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/0405/0084/files/renotewunes.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/converso_fahrenheit_para_celsius.pdf
    • https://cdn.shopify.com/s/files/1/0433/0897/4235/files/92785372388.pdf
    • https://cdn.shopify.com/s/files/1/0432/3419/7666/files/18579585615.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_off00006307.bin
cbd3749d5eaac1e03157a3cb6fdd470e5f658baf9770051379190c314b03825e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6307 5252 bytes
font_01_sfnt_off000074c3.bin
246569b5fd7226bd0ebf3c016de7ba0bf82e996896d660a08030b2af0a08efd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74C3 1936 bytes
font_02_sfnt_off00007e04.bin
a99702c346be7ff6ac50c302a12919fa35dce515d3ea6ed273f985a0dbf50730		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E04 10604 bytes

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