Malicious PDF — malware analysis report

Static analysis result for SHA-256 107e7d814804bd8b…

MALICIOUS

PDF

60.1 KB Created: 2020-08-04 01:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aff8b431822c7b0e730dd660a9f8b45a SHA-1: b32b3900ae0f4e8ddf02ada4835bbb00829d8e0b SHA-256: 107e7d814804bd8b3c2b315db7ce2ea5b4fdaf5365f5d3bcf5923f0efad70add
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. This suggests the document is part of a link farm designed to distribute malware or phish for credentials. 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=islamic+baby+boy+names+in+urdu+with+meanings+2020+pdf
    • http://files.yeshirts.com/uploads/1/3/0/7/130739312/5125077.pdf
    • http://files.sara-rodrigues.com/uploads/1/3/1/8/131857916/6917007.pdf
    • http://files.keranchselma.com/uploads/1/3/1/4/131483955/4064659.pdf
    • http://files.crescentmoondesignsjewelry.com/uploads/1/3/0/8/130873738/suwekitumipuwa_netowajilavo_vutok_givusa.pdf
    • http://files.threeforksambulance.com/uploads/1/3/2/6/132681916/jakepinowesutix-letigumi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/posatununonezovopo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/9218358057.pdf
    • https://cdn.shopify.com/s/files/1/0434/3857/1670/files/lalimezu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5235/files/27711353216.pdf
    • https://cdn.shopify.com/s/files/1/0437/9593/9488/files/56132635137.pdf
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/tavewobeputumizuruv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5129/4628/files/cs_go_crosshair.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/15174929713.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0772/files/pibokewonotil.pdf
    • https://cdn.shopify.com/s/files/1/0437/8922/2045/files/savomutemilo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3826/0899/files/xozopelika.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/xakejil.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0417/files/dutepigudomenuzeludava.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000b648.bin
b104d1112d021f45cc9d061f202eeecd9a0a5b01df6d9478578b76e09db4730b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB648 25244 bytes
font_00_sfnt_off00007fa0.bin
ec8437dcfe4f444d8db37d813cf177a03f53c897261d20b89a5bd6bcb7e6f46c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FA0 6116 bytes
font_01_sfnt_off00009458.bin
6e2c8334d3506da2fca9a98ff2d28d21d1ded6f7eeed239e9d6d92ef6461a779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9458 9868 bytes

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