Malicious PDF — malware analysis report

Static analysis result for SHA-256 1423cf3922bfdb39…

MALICIOUS

PDF

46.9 KB Created: 2020-08-14 01:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2fecf2219c5d1bcd0d2d26b2f10805f SHA-1: 89ea8bb7cac8cb19709170e22e860e0cefb57eb1 SHA-256: 1423cf3922bfdb39b1e179e9ebf341bc5bf84ac732ecb556bae0524a9a5cf3cc
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, includes a URL that appears to be part of a link farm designed to attract traffic. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is intended to redirect users to harmful content.

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=date+sheet+mdu+5th+sem
    • http://files.non-disneyinternationaldubbingcredits.com/uploads/1/3/0/9/130968943/633d0454e42c.pdf
    • http://dosekuj.melissahamiltonphotography.com/uploads/1/3/2/8/132816066/4625638.pdf
    • http://zabus.nhinayasss.com/uploads/1/3/1/3/131380081/3a3736700e85a46.pdf
    • http://fikapepi.worldscreenculture.tv/uploads/1/3/2/8/132815367/27b3d21a3719.pdf
    • http://kexuzafi.growmusicmissoula.com/uploads/1/3/1/3/131397987/rokuwore-fixumomonara-kaxewetejapebux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/2449/9367/files/xofudi.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/6482732242.pdf
    • https://cdn.shopify.com/s/files/1/0432/4209/4756/files/92226273405.pdf
    • https://cdn.shopify.com/s/files/1/0430/9280/3744/files/93103646097.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8885/files/bogekonim.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/zoterawubasarekujupijul.pdf
    • https://cdn.shopify.com/s/files/1/0433/5088/4505/files/bijojikidelenufafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/6768/6558/files/adolescent_health.pdf
    • https://cdn.shopify.com/s/files/1/0430/6393/5129/files/72297226472.pdf
    • https://cdn.shopify.com/s/files/1/0434/9673/4885/files/91352818340.pdf
    • https://cdn.shopify.com/s/files/1/0429/3607/4396/files/78212729502.pdf
    • https://cdn.shopify.com/s/files/1/0432/8282/5382/files/85795485203.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/meverisigigotumal.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nadogenomaxijedunebenez.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b0b.bin
e380cf565225a8935edbe7a5b477b840bcbe8c5274ccc33aae673d161d38a017		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0B 4680 bytes
font_01_sfnt_off00007aef.bin
d1c6449947489fdad714d84d5bcd9e37b5b797326c27083353a38ccffe501c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEF 11652 bytes
font_02_sfnt_off0000a075.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA075 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.