Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a831a2d93406a7…

MALICIOUS

PDF

64.8 KB Created: 2020-08-25 19:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60f87852a8db6555524bf3b0dd6ef887 SHA-1: 9455c822e39dbf2c6f5e08b83d2bf91158858c79 SHA-256: 37a831a2d93406a7271f273deef6b85512347310657d65b80b4085b3cdcdb5db
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/pify?keyword=real+book+5th+edition+pdf+c', is designed to lead users to malicious infrastructure. The PDF also contains a link farm heuristic, indicating a large number of external links, with the first being 'https://cdn.shopify.com/s/files/1/0438/4607/4525/files/weathertex_cladding_sheet_sizes.pdf'. The overall purpose appears to be social engineering through a deceptive link.

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.link/pify?keyword=real+book+5th+edition+pdf+c
    • http://files.shopcuriosities.com/uploads/1/3/2/7/132740329/jedetunefumujexonos.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/weathertex_cladding_sheet_sizes.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/78031416812.pdf
    • https://cdn.shopify.com/s/files/1/0430/6137/9226/files/lavofediz.pdf
    • https://cdn.shopify.com/s/files/1/0452/2721/2957/files/msds_boraks_bahasa_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0432/1381/5966/files/39763147459.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/24910816138.pdf
    • https://cdn.shopify.com/s/files/1/0435/8189/8913/files/58596674521.pdf
    • https://cdn.shopify.com/s/files/1/0464/8747/0248/files/75740419606.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/gejigazapa.pdf
    • https://cdn.shopify.com/s/files/1/0432/7469/8902/files/recipe_for_buttermilk_chocolate_sheet_cake.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/antigeno_prostatico_valores_normales_segun_la_edad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1551/files/menuzitiligowivo.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_off0000aabb.bin
2b038b80671e8ba8ca8fd45fd2e098d15d9e795d13e4439431a91bedd703c089		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAABB 5304 bytes
font_01_sfnt_off0000bcc2.bin
ed088694cf2dd69fec3f75e28651054fcd9f126f8833f65b817619557b5b2990		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC2 10544 bytes
font_02_sfnt_off0000e100.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE100 16120 bytes

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