Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a2f308f2c86d89…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 05:03:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cff082cc0fe0143ab98362bd57aa08e SHA-1: bc291c4360f7a24536fa432b82cdd7a332384928 SHA-256: 61a2f308f2c86d89a2241ae2a0f54cd885dfe6481324b07a1e177a5f688f45af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of external links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains the same suspicious URL. This suggests the primary purpose is to lure users to malicious infrastructure, potentially for further exploitation or phishing. No scripts were extracted, and the family is unknown.

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/wix?keyword=tales+of+maj%2527+eyal+doombringer
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/9e41f0_769dc3c5d57d4dc98f331d867f2ba143.pdf
    • https://static.usrfiles.com/ugd/3dd68e_9bc57bde90b24be5bc0551a6df339ba6.pdf
    • https://static.usrfiles.com/ugd/26481d_072729db428344798b828f60513b1562.pdf
    • https://static.usrfiles.com/ugd/a382ee_843749e0e3fc4aa6a0106e0bf4223d6b.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/18412136838.pdf
    • https://cdn.shopify.com/s/files/1/0438/5108/8032/files/duzupex.pdf
    • https://cdn.shopify.com/s/files/1/0437/8702/6590/files/ipod_nano_games.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/kamaponiludo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6462/3265/files/58324079272.pdf
    • https://cdn.shopify.com/s/files/1/0439/8543/6830/files/jspdf_autotable_in_angular_6.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1634/files/copy_constructor_c.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/variant_configuration_in_sap_pp.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/56382371067.pdf
    • https://cdn.shopify.com/s/files/1/0437/2401/3722/files/video_cutter_free_android.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1632/files/relamefosojozozeb.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/wolfenstein_the_new_order_wont_launch.pdf
    • https://cdn.shopify.com/s/files/1/0439/4736/0414/files/308_ammo_fallout_4.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_off00006446.bin
7e2dab8b513c6b5a4b5e2dd3e173b7778782445072530ca13cdc2f025f7235e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6446 5528 bytes
font_01_sfnt_off00007714.bin
66201aa500500039b8478ea5bbb80161a6b53a066f75c9b95f15908bf4102c69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7714 10332 bytes

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