Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a53011c3ce4d01…

MALICIOUS

PDF

45.9 KB Created: 2020-08-29 04:32:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7e962f65971be3f13813ec8a64dfec5 SHA-1: c75cb295af50347e2beae843a01b91c01bd570cd SHA-256: 32a53011c3ce4d0105aa59d303c4fd99a5ffeade3023437b38c251c0fbc9fa20
152 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, a technique often used to obscure malicious destinations. One of the extracted URLs, 'https://ttraff.me/wix?keyword=zowie+ec2-a+manual', is identified as a known malicious redirector. The file also exhibits characteristics of a PDF link farm, with numerous links pointing to external content, further supporting its malicious intent.

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=zowie+ec2-a+manual
    • https://static.usrfiles.com/ugd/b8c837_115eaea699644f26a15e37c619cc6644.pdf
    • https://static.usrfiles.com/ugd/b8c837_288cb9325af442adb59e88c661e492c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f82b275dd6647108942db68a6ada06e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1239dc3b41c64075bf518c58abdd1436.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/blood_type_o_negative_diet_food_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/8583/1070/files/volvo_xc60_automatic_vs_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peposorutap.pdf
    • https://static.usrfiles.com/ugd/b8c837_b023001898134fe8b6c924ffb909eb18.pdf
    • https://static.usrfiles.com/ugd/b8c837_db4d21784f024377b6338dbf6a7ed39a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4890071b2bbf4314940612ace5b2b058.pdf
    • https://static.usrfiles.com/ugd/b8c837_96d9177770fe431aadc31bbdf0304b19.pdf
    • https://cdn.shopify.com/s/files/1/0432/0080/7074/files/avast_antivirus_pro_apkpure.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6455/files/puludimonusukonatazitasup.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/24069828531.pdf
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/winalipadulagoval.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_off00006aae.bin
b9df1f4f0f5c90b5918193a53f9e8710c1ae049820aba8361be68d402ec8f3a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAE 4684 bytes
font_01_sfnt_off00007a8d.bin
e667b066211730849d6a776f9355b780c5cca0bf69ee4f22f393a085eeb44340		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8D 10044 bytes
font_02_sfnt_off00009cdb.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CDB 4324 bytes

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