Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc7ca09a1559557…

MALICIOUS

PDF

46.1 KB Created: 2020-07-29 16:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30d7618f93c97c2ead378356cdc22a82 SHA-1: b374f3e750087f1afa66791d65ca2f85006a00f6 SHA-256: 4fc7ca09a15595571df03f49522700d9c39a18a23ae9d3dfc1833cfc95f0ccf5
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=negative+impact+of+globalization+in+africa+pdf'. The document body, though heavily obfuscated, suggests a lure related to 'Negative impact of globalization in africa pdf'. 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.ru/pify?keyword=negative+impact+of+globalization+in+africa+pdf
    • http://files.travelbutlerllc.com/uploads/1/3/1/4/131438718/f6cbbf07.pdf
    • http://files.visitdvcc.org/uploads/1/3/1/3/131379496/6636667.pdf
    • http://files.calmingtones.com/uploads/1/3/0/8/130814605/1493961.pdf
    • http://files.financialproductsresearch.com/uploads/1/3/1/8/131871535/2275766.pdf
    • http://files.calmingtones.com/uploads/1/3/0/8/130814605/149396
    • https://cdn.shopify.com/s/files/1/0428/3957/2643/files/mimiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/28069592250.pdf
    • https://cdn.shopify.com/s/files/1/0428/7820/6111/files/zobezineneguzonedafusos.pdf
    • https://cdn.shopify.com/s/files/1/0431/9340/1501/files/japasiwemufaxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/22926220071.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86593634255.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32867625585.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/porovurujapiganipuzul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wunize.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/tajutosilofibirasomixu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4774/6710/files/sawase.pdf
    • https://cdn.shopify.com/s/files/1/0430/5082/7929/files/20788826687.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nunirisolifugonogebivaxez.pdf
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/sojisedinizuxopazanozapaw.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_off000076c5.bin
4a9480d0f42f20bffc08d4ba3dc93155dcd0f2550e5475f841c115f88797bb4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76C5 5304 bytes
font_01_sfnt_off000088c4.bin
ed52a2a9c5585f47ef41414034c70f075ca2192fd1f175893d3d08c52921b5bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88C4 10028 bytes

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