Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd906acecc67194…

MALICIOUS

PDF

47.2 KB Created: 2020-08-25 15:39:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55199ad012d6bc80b9f6011076fd6178 SHA-1: 5fbd73254ad2576387151211cfe696d7805df16f SHA-256: 2dd906acecc67194e8de71ea8fe52e3b60b57556db800e878f9609ecac27c199
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to interview questions and the malicious URL, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on shopify.com, which are likely part of a link farm to improve SEO for the malicious redirector.

Heuristics 3

  • 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.
  • 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=behavioural+interview+questions+and+answers+examples+nz
    • http://files.thierryrmontoya.com/uploads/1/3/1/3/131380337/jejal.pdf
    • http://files.songwritertill.com/uploads/1/3/2/6/132682329/8893358.pdf
    • http://files.gnslasvegas.org/uploads/1/3/2/7/132740584/9206975.pdf
    • https://cdn.shopify.com/s/files/1/0436/1977/8720/files/amelie_piano_song.pdf
    • https://cdn.shopify.com/s/files/1/0462/9053/4561/files/92858400390.pdf
    • https://cdn.shopify.com/s/files/1/0439/3218/8840/files/canyon_burger_menu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/wuvulobelolodotaragekef.pdf
    • https://cdn.shopify.com/s/files/1/0440/3606/3397/files/sijitedifimanujufuzi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0947/files/libro_defensa_siciliana.pdf
    • https://cdn.shopify.com/s/files/1/0460/7108/7268/files/date-_fns_format_utc.pdf
    • https://cdn.shopify.com/s/files/1/0432/8030/2244/files/99432714081.pdf
    • https://cdn.shopify.com/s/files/1/0439/6508/7902/files/70659869969.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_off00007995.bin
55b683a10559f26d339c5a5ef16c8e984f40830292629de2aa3300ae5ab90b9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7995 5644 bytes
font_01_sfnt_off00008cb8.bin
6f5fa9742572e964d1114ff124c029d8bf78e1ae35ddec9a27f8e2973c758fb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB8 10352 bytes

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