Malicious PDF — malware analysis report

Static analysis result for SHA-256 a01a6359f39e790e…

MALICIOUS

PDF

41.3 KB Created: 2020-09-01 15:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b76652e23f6f64e15524318f5e120bc SHA-1: 0d77d0ba16ac36e2c557728886d7e9e2533260d2 SHA-256: a01a6359f39e790e4cd61b35ca767ac9cc11dc7a6c4ee61d055ba8f6b69c9bc6
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it's a malicious redirector link, pointing to a URL designed to lure users with a search query for 'embedded systems objective questions and answers'. The document also functions as a link farm, embedding numerous external PDF links, many of which host benign content on Shopify. The primary malicious link redirects to a URL that is likely part of a phishing or malware distribution chain.

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.link/wix?keyword=embedded+systems+objective+questions+and+answers
    • https://cdn.shopify.com/s/files/1/0454/8486/7736/files/wudenikimasebotofutar.pdf
    • https://cdn.shopify.com/s/files/1/0460/3346/9604/files/under_the_sea_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0433/6071/4904/files/murolulexepulibenale.pdf
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/apprendre_l_italien_facilement.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/gipanafojawo.pdf
    • https://cdn.shopify.com/s/files/1/0437/9446/4929/files/larousse_livre_de_bord_orthographe.pdf
    • https://cdn.shopify.com/s/files/1/0438/7376/3496/files/refraction_definition_physics.pdf
    • https://cdn.shopify.com/s/files/1/0469/0070/7490/files/matematicas_3_larson.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_67891152de4640c18d955aa87f764c19.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_77f69b4d131e4a888e7deb26da6a5c93.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_71d25386cfb249b7ae5cb5a27ea30612.pdf
    • https://static.usrfiles.com/ugd/9734e7_0c881d37c2f9417aa42788261a38f184.pdf
    • https://static.usrfiles.com/ugd/b8c837_83c94c35d1d04a19bc32a8329cb88f04.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_off000062d4.bin
06ab2fe76faf596a92deb0c7011292d9b65a08fb35466dffc2e9083088bb1a49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 5608 bytes
font_01_sfnt_off000075ec.bin
90cb5f254f0c65749b47ddfeaecd8fc4f1d3bb19f8196f192e4a48d413279dda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75EC 10164 bytes

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