Malicious PDF — malware analysis report

Static analysis result for SHA-256 715bd78142fd6b0e…

MALICIOUS

PDF

50.0 KB Created: 2020-08-26 07:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 000f1e3348b3fe3c287af19eb4365e01 SHA-1: 7ba31939f1cb14f2e9a0600bb35b4e36c6a33bfe SHA-256: 715bd78142fd6b0e369cb1180a35e141adede179ceb77758bb1cf8718f329099
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes the malicious URL and appears to be a lure related to a product. The presence of numerous external links suggests an attempt to leverage link farms for SEO poisoning or traffic redirection.

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.ru/pify?keyword=hansaplast+insect+bite+patch
    • http://files.willsphotographypa.com/uploads/1/3/0/7/130739654/bujixojabaxosa-vevawe-lomikazixibet-pamos.pdf
    • http://files.francesmcmahonward.net/uploads/1/3/0/7/130739828/932577.pdf
    • http://files.yellowbirdnestweddin.com/uploads/1/3/1/4/131407968/3b584f27f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3896/4903/files/dark_eldar_codex.pdf
    • https://cdn.shopify.com/s/files/1/0428/2122/2567/files/artificial_intelligence_in_pharmacy.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/tonesoxizonex.pdf
    • https://cdn.shopify.com/s/files/1/0432/5644/7136/files/nucleophilic_substitution_reaction_of_benzene.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/lufupuvolupi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdf
    • https://cdn.shopify.com/s/files/1/0432/4337/2699/files/satoshi_mines_bot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/milazagadivasejufubexewig.pdf
    • https://cdn.shopify.com/s/files/1/0431/0967/9265/files/before_and_after_numbers_worksheet_for_kindergarten.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064f4.bin
ec045ba662f2c3382c7204da947374fb8f95e6ccab0b7d7a8a4fd975b43a9956		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F4 5024 bytes
font_01_sfnt_off000075f0.bin
6e5de5c6bcb7fdd8c5ca0d25823a8f80e6c764803c1b732dbc9c425a5c0f8ea5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F0 2092 bytes
font_02_sfnt_off00007f96.bin
92ce9edce825e34a59b319554ad3d2a9aa8f3b1fb8be3cdba4e05425f2274bd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F96 11100 bytes
font_03_sfnt_off0000a5a9.bin
18f56b7fae04e07bc119a468ad323bdda099da77b0772854d1c47cc1f39b9f3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5A9 16144 bytes

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