Malicious PDF — malware analysis report

Static analysis result for SHA-256 059ddbff3c17bc54…

MALICIOUS

PDF

46.9 KB Created: 2020-08-11 06:47:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 208a0261a350d6bb30bb92a59cc8113f SHA-1: f79822f5972a5788af3d66946b35b4c3437137da SHA-256: 059ddbff3c17bc54aae30a5dd656e0e8d095d4ba7a763ce4473f045f00794cc4
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as free downloads, but the primary link redirects to known malicious infrastructure. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a SEO poisoning or link farm attack. No scripts were extracted, but the document body contains obfuscated text and URLs.

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=dias+chemistry+notes+pdf+free+download
    • http://files.antonellascafe.com/uploads/1/3/2/6/132695887/7582891.pdf
    • http://fuwomeled.keywestresortcasino.com/uploads/1/3/1/3/131380600/081a42.pdf
    • http://sukitif.anglewoodestate.com/uploads/1/3/0/8/130874474/8a5acd0c6.pdf
    • http://files.argos101media.com/uploads/1/3/2/6/132696077/xuwetus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/lekobukojosidog.pdf
    • https://cdn.shopify.com/s/files/1/0433/4295/4661/files/98684616538.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5193/files/bupijifako.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zetuvoveluganimuwejipas.pdf
    • https://cdn.shopify.com/s/files/1/0431/5440/7580/files/9758811833.pdf
    • https://cdn.shopify.com/s/files/1/0430/8900/2653/files/poterutubezeponuxagukizak.pdf
    • https://cdn.shopify.com/s/files/1/0433/2732/4310/files/7203642540.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/dayc-_2_scoring.pdf
    • https://cdn.shopify.com/s/files/1/0433/9843/0876/files/leadership_dubai_style_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/burenatefofuvunozapowi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/64841579392.pdf
    • https://cdn.shopify.com/s/files/1/0435/8130/9083/files/synthesis_of_benzothiophene.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054f2.bin
a027ff1379ad07f05567cb694792342af510cfc94be8baae9b50a9f30cef3e93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54F2 5376 bytes
font_01_sfnt_off00006724.bin
bec2c6fc5ecd20a9e04b38ce79de3e53a09e2627ee6f6de1d14247aa789848ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6724 10404 bytes
font_02_sfnt_off00008ad6.bin
ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD6 16164 bytes
font_03_sfnt_off00009fee.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FEE 4324 bytes

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