Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a2d4fd044b42df2…

MALICIOUS

PDF

52.6 KB Created: 2020-09-03 03:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f541e193ce28ce1c303ad2eb1552148 SHA-1: 30d8fc92f339773474e8acc2b1c797e8abc700f3 SHA-256: 7a2d4fd044b42df20a508888adcc4466a0e963a6d3403a2444f0e372a9a91894
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'metformin er 750 mg reviews' and the malicious URL, suggesting a lure to a phishing or scam page. The presence of numerous external PDF links also indicates a link farm, likely for SEO manipulation or to host further 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.link/wix?keyword=metformin+er+750+mg+reviews
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/22bf55_7dc5fda013904948a9d69124cba0c13d.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d3cd954f1da4bada83340c99be8475f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1a5f92b248f644aebb64990e07b4a0b4.pdf
    • https://static.usrfiles.com/ugd/96bf9d_12b6c19fe5984e8ca68e746718912231.pdf
    • https://static.usrfiles.com/ugd/b8c837_abcc28a4d8af49968202b82dd3743905.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a9ccaf4b064448a86884bd602857cf8.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8342/files/age_of_empires_2_hd_microsoft.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6905/files/gagozoxejikedogodala.pdf
    • https://cdn.shopify.com/s/files/1/0435/4598/5179/files/luvulukivefakirod.pdf
    • https://cdn.shopify.com/s/files/1/0437/9197/4557/files/mufexuxuweb.pdf
    • https://cdn.shopify.com/s/files/1/0434/2264/6422/files/allotropic_forms_and_unique_properties_of_carbon.pdf
    • https://cdn.shopify.com/s/files/1/0432/6352/5026/files/mamodavumabajipuronovox.pdf
    • https://cdn.shopify.com/s/files/1/0437/3073/1173/files/dslr_blur_background_pic.pdf
    • https://cdn.shopify.com/s/files/1/0432/2364/6365/files/hma_vpn_apk.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/mango_capsa_susun_2_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7670/files/niwolijidulametaxi.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_off00008eec.bin
29f84405171350bf35786e95a5e1252e2080da269d536ce6b065903472c8aa58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EEC 5348 bytes
font_01_sfnt_off0000a13d.bin
c3d59a69af986aa014a3072ceba6b87282f0f023e1ff88412ce992935eabf975		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA13D 10556 bytes

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