Malicious PDF — malware analysis report

Static analysis result for SHA-256 311d49f24852bb96…

MALICIOUS

PDF

37.5 KB Created: 2020-09-16 23:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e25c8e4ebd8a6e56752d8dbd8f46d71d SHA-1: 255ade444041043df44a7f845e0fc08aa74e1131 SHA-256: 311d49f24852bb965198c73c0e521faa1e00680b29515350f69892e013f6530f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=jeep+renegade+service+manual+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains text related to a 'Jeep renegade service manual pdf', suggesting a lure to entice users to click the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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.me/wix?keyword=jeep+renegade+service+manual+pdf
    • https://cdn.shopify.com/s/files/1/0436/9442/4232/files/lizowulafiwuzowapedaku.pdf
    • https://cdn.shopify.com/s/files/1/0468/0774/4666/files/virekal.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/litefakapukogixojaxogul.pdf
    • https://cdn.shopify.com/s/files/1/0428/4222/6854/files/53439379824.pdf
    • https://cdn.shopify.com/s/files/1/0431/8078/5823/files/aegis_legend_200w_mod_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/79511185574.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6811/files/kivobawogoxirixirodeme.pdf
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/juzezebadiponejetokex.pdf
    • https://bab2d624-8c30-4acf-938a-3196029444a0.filesusr.com/ugd/7d1dc9_bbdffa30512a4279a10390aaac6b852a.pdf?index=true
    • https://31b2cf9d-651c-47b2-ad21-95450fe14cf4.filesusr.com/ugd/370ea2_9faf1a7a7bba42f2a30a3e0c4cae9e67.pdf?index=true
    • https://bbdba7c9-f48a-48b4-a0f3-7c51e23ff68c.filesusr.com/ugd/eb5a6a_9d26565252ac48b6befda7baffb66a87.pdf?index=true
    • https://a32ac340-e232-42f0-8f3d-87e0337889a2.filesusr.com/ugd/76156b_3082b703e696496ca75cd10392ada332.pdf?index=true
    • https://99d19926-65f0-42b0-bcbb-1ece389c399c.filesusr.com/ugd/24deb6_0afa0232420341958d29720c4f309fc3.pdf?index=true
    • 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_off000052f6.bin
efce21f0dc87aa71f8543fc4ecc7e1c6ae9846cc61ec2a9f837fa655a13fb767		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52F6 5524 bytes
font_01_sfnt_off000065b7.bin
9f16c24add8f79e2e1d1e4e8c00f5ed601594bba0fefe2f0b1a3e46d9b2ff54f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B7 10344 bytes

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