Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4419dbde0fe48f8…

MALICIOUS

PDF

44.7 KB Created: 2020-08-29 10:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43e597d2549695d3231fbec749b21f98 SHA-1: e18e9e5b34836e84464f04b04fe72115d1a7c4cc SHA-256: d4419dbde0fe48f841add3319c3c8687d597e0572c816a094561ada2c97d8416
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.com/wix?keyword=axel+f+piano+sheet+music+easy'. The document body contains garbled text but also repeats the malicious URL and a benign Shopify URL, suggesting an attempt to disguise or distribute the malicious link. The presence of numerous Shopify links points towards a link farm or SEO manipulation tactic.

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/wix?keyword=axel+f+piano+sheet+music+easy
    • https://creativeco
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/45431935106.pdf
    • https://cdn.shopify.com/s/files/1/0460/1688/8999/files/kugebuparewotejatex.pdf
    • https://cdn.shopify.com/s/files/1/0432/6667/0745/files/renee_gladman_calamities.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/integral_calculus_by_das_and_mukherjee_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8250/5628/files/airmen_y_group_previous_year_paper.pdf
    • https://cdn.shopify.com/s/files/1/0431/2567/0042/files/15536662285.pdf
    • https://cdn.shopify.com/s/files/1/0431/7108/6492/files/phonics_worksheets_grade_5.pdf
    • https://cdn.shopify.com/s/files/1/0434/0436/1895/files/litafigadunudujofaki.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kipisoluni.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0141/files/59551228428.pdf
    • https://cdn.shopify.com/s/files/1/0435/2920/7957/files/cultivo_bacteriano.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a04c6800a3d42cba81c15989a73913a.pdf
    • https://static.usrfiles.com/ugd/b8c837_1008a45593a0482ba727a4884fcec52b.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fcee2258a4d418ea635d4094cd36c73.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_off000063c0.bin
ca90d20f0e44f38533e2145f7a508893afc26b9528e401383d346a3e64cdc3f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63C0 5320 bytes
font_01_sfnt_off000075bd.bin
6486c088bda9fa27ab949f684f6a9335906f382937e6f947decb671593b25cb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75BD 14900 bytes

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