Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ada1e609313eb6…

MALICIOUS

PDF

42.0 KB Created: 2020-08-10 03:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 908eec21cfc796d33f09056cb1810ae8 SHA-1: 0c0564f4fb53ee7da3422ca1f2c3e20c3d19d54f SHA-256: 09ada1e609313eb6ac07af61c4a3cc1463bf062721e4528cd49f912422e0fab9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm designed to distribute malicious content. The primary malicious URL identified is a redirector that uses a keyword related to holistic biomagnetism, suggesting a lure to a scam or phishing page. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged for containing a link farm.

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=biomagnetismo+holistico+pdf
    • http://files.winnipaul.com/uploads/1/3/1/4/131407406/vosipazunutubunob.pdf
    • http://files.acousticservices.info/uploads/1/3/1/4/131437578/sipalukonovumevo.pdf
    • http://files.elvesandmorewestmi.org/uploads/1/3/1/3/131382808/vufutifasab.pdf
    • http://files.carolitaro.com/uploads/1/3/1/3/131380558/0d0d2710e949c5.pdf
    • http://files.cristinaliomakeup.com/uploads/1/3/1/3/131378975/popovowugofu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/75725272933.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/anyone_who_knows_what_love_is_piano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67142307476.pdf
    • https://cdn.shopify.com/s/files/1/0436/0785/1171/files/einfache_bruchgleichungen.pdf
    • https://cdn.shopify.com/s/files/1/0431/7957/3408/files/nkjv_bible_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/9664/5538/files/hallelujah_lyrics_alexandra_bruke.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/pabedofatiwafaligani.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/47668188930.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/51188131973.pdf
    • https://cdn.shopify.com/s/files/1/0430/0872/1045/files/budoralavepitotowi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/jikavuxuseluxinur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/febipak.pdf
    • https://cdn.shopify.com/s/files/1/0431/5152/4008/files/midas_touch_kiyosaki.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000664d.bin
139366281b2e4ff3c14ca17f5a753f7b48df4d8ac772f3215f7306a8f408b396		 pdf-font-stream PDF embedded font (sfnt) at offset 0x664D 5524 bytes
font_01_sfnt_off000078f8.bin
1bb4fa6f671ca81f5e8b829c498a2689114846021a178f6cc0d6aeb6c3a10b46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F8 9952 bytes

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