Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1eef7ff363141c9…

MALICIOUS

PDF

39.8 KB Created: 2020-08-22 19:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cda2fb265195bfd720dc2a40d89b8e59 SHA-1: cfdfa8956be15901cf5542c912559db7dafa78a0 SHA-256: d1eef7ff363141c9fc96e091568065e5b0f63d6ab6eb3279d4f1c2e6fe8c568e
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the PDF is designed to redirect users to malicious content, likely for further exploitation or credential harvesting.

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.cc/pify?keyword=manuale+italiano+burris+eliminator+3
    • http://files.mrsararadian.com/uploads/1/3/1/4/131453676/725d0ad5d8b20d.pdf
    • http://pomalojo.togetherforasthma.org/uploads/1/3/1/3/131383483/bbfc8b9e21267.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/45702947970.pdf
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/gebusivixutarawejedulagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3749/files/senipizipebokebagonej.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/wevulavadoxoluxusit.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/jigonavagebaf.pdf
    • https://cdn.shopify.com/s/files/1/0458/2866/9603/files/movie_er_app_for_android_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/72932161751.pdf
    • https://cdn.shopify.com/s/files/1/0432/2197/5197/files/ravuzuzuve.pdf
    • https://cdn.shopify.com/s/files/1/0428/2171/4079/files/jio_voice_call_recorder_app.pdf
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/tivogor.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_off00005864.bin
37f72fb1b5d46abffa79034c58f8b5fbc9fc40b1cef9148bf4dea13df4ae4629		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5864 5140 bytes
font_01_sfnt_off000069c1.bin
67a24c4cf7582e19c3f16bf0591c303fbdcaaadf5fcd5a266fb91c2bf384f33a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C1 11916 bytes

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