Malicious PDF — malware analysis report

Static analysis result for SHA-256 71576bcf30879348…

MALICIOUS

PDF

50.3 KB Created: 2020-08-06 10:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 058ffa5603ae205af7e34475891ebf56 SHA-1: ef29b2156c148aaf1ae191529bfaf3d65d896c37 SHA-256: 71576bcf30879348e7c8114fd23b4e03fb8e70e507c1efd484b63a591afa753f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be the same as the one identified by the heuristic. The presence of numerous PDF links, many pointing to Shopify domains, suggests a link farm or redirection scheme designed to obscure the ultimate malicious destination.

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=probability+sample+space+pdf
    • http://lutop.gethealed101.com/uploads/1/3/0/8/130874422/2efef3dc816ff6a.pdf
    • http://vizuzi.dawnlsievers.com/uploads/1/3/0/7/130775436/diluzisuruxagav-siziwigesud-rukor.pdf
    • http://jijinidog.jamesawatsonjr.net/uploads/1/3/0/8/130813765/8237951.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2285/9944/files/49456971108.pdf
    • https://cdn.shopify.com/s/files/1/0434/1307/8168/files/3_point_hitch_backhoe.pdf
    • https://cdn.shopify.com/s/files/1/0439/5152/1947/files/82684882855.pdf
    • https://cdn.shopify.com/s/files/1/0433/4642/8062/files/73453367619.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/70717703868.pdf
    • https://cdn.shopify.com/s/files/1/0440/4094/5829/files/kedewewenasetuwitapesut.pdf
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/affidavit_of_death_of_joint_tenant.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/21685939152.pdf
    • https://cdn.shopify.com/s/files/1/0438/0976/7584/files/wumeliwimelilefijavar.pdf
    • https://cdn.shopify.com/s/files/1/0428/3446/0828/files/digalitiradunefa.pdf
    • https://cdn.shopify.com/s/files/1/0431/7013/6230/files/90783467965.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/99777818782.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/21974076202.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1964/files/6041138737.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91146339154.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006685.bin
a1c8f9e2c1e2c9c157ddf1b655db0af4c25d109cf1dc7d03bab4329d7753533f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6685 5544 bytes
font_01_sfnt_off0000794a.bin
0af076739801fe88fd44ba49187aba5271e7160503261022fc41f3ac6c788500		 pdf-font-stream PDF embedded font (sfnt) at offset 0x794A 14404 bytes
font_02_sfnt_off0000a6ae.bin
ffba1789c03dc4e924b119e64692b39832a6a6fa07a09b912f130fca48fe89e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6AE 16204 bytes

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