Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08467bd327fd206…

MALICIOUS

PDF

50.2 KB Created: 2020-08-08 12:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39be8fab2dc62088c3ae28d3641eda88 SHA-1: 7911e6464fae3a4783d16cdd5d0182c45c1d137a SHA-256: f08467bd327fd2067ed3296d038ff876d38a8e7f403072e85c275472d7b0dc92
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'alchemy symbols and meanings list pdf' and the malicious redirector URL, suggesting a lure to trick users into visiting potentially harmful content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=alchemy+symbols+and+meanings+list+pdf
    • http://files.fithealthyyoufitness.com/uploads/1/3/0/9/130969371/lojiwu.pdf
    • http://files.hansmatheson.org/uploads/1/3/1/6/131637374/9f067b.pdf
    • http://jenutagod.beholdinghimbecomingmissional.com/uploads/1/3/0/9/130969772/vuzat-taselixanutapo-kazifibuxofuk.pdf
    • http://files.acrobaticdivision.com/uploads/1/3/2/8/132815003/pizevibexam.pdf
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/lelomijoligixivenina.pdf
    • https://cdn.shopify.com/s/files/1/0435/5332/5224/files/berliner_platz_vk.pdf
    • https://cdn.shopify.com/s/files/1/0451/6829/6090/files/biochemistry_and_molecular_biology_of_fruit_maturation.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/bekiloturuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4656/8098/files/33904657398.pdf
    • https://cdn.shopify.com/s/files/1/0428/1162/1543/files/wow_classic_leveling_guide_addon.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/lenev.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/tufedinipal.pdf
    • https://cdn.shopify.com/s/files/1/0433/2270/4030/files/873102539.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/63003010924.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/1157140517.pdf
    • https://cdn.shopify.com/s/files/1/0438/2497/1936/files/41964322546.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b07.bin
dd45e9719366475bf97c2af230d4b2bfa121c4fbd6bf551d9e6897188bfcae1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B07 5704 bytes
font_01_sfnt_off00007e5e.bin
288a057a0d35ba2a0792678249cbc3a19f9116c497bf522ffd4da5b71958f6ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5E 10124 bytes
font_02_sfnt_off0000a144.bin
12736fb132c280d1d36e012fb8608e42d726ec90ef3bc29102af57bff28f463c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA144 17544 bytes

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