Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d6d02abd9ead93b…

MALICIOUS

PDF

45.9 KB Created: 2020-09-29 18:58:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a925108abafda6b2a6ecd033ddf7e8c3 SHA-1: f64c7fd991c98dbc589f05fe32059be7e830dccd SHA-256: 5d6d02abd9ead93bd4ae1faf5a3a1a574152d15b52e43fb8460b2987145e9ccb
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors or link farms. The ML classifier also strongly flagged this PDF as malicious. The embedded document body text, while heavily obfuscated, contains URLs that are consistent with the link farm heuristic, suggesting a coordinated effort to drive traffic to potentially malicious sites.

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://ggtraff.ru/strik?keyword=amylose+cardiaque+irm+pdf
    • http://wuruso.en.katakeresztely.com/uploads/1/3/2/3/132303221/644328.pdf
    • http://files.clergysurvey.com/uploads/1/3/1/3/131379396/supujivugujoradiwure.pdf
    • http://faguzavut.varanasiastro.com/uploads/1/3/1/4/131409098/9791adf6a1.pdf
    • http://files.sydneykarls.com/uploads/1/3/1/3/131381919/d0a73a5bcb388.pdf
    • http://files.ashleyerina.com/uploads/1/3/1/1/131163550/91ea94.pdf
    • http://files.resosurdite.com/uploads/1/3/1/4/131408788/bujelimi_vagoxizerat_zowunusuzabose_nufuju.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0431/3247/files/easl_practice_guidelines_hcc.pdf
    • https://cdn.shopify.com/s/files/1/0448/4520/3618/files/peramupotut.pdf
    • https://cdn.shopify.com/s/files/1/0480/2016/0671/files/unanimous_consent_definition.pdf
    • https://cdn.shopify.com/s/files/1/0485/1571/1138/files/julio-claudian_dynasty_family_tree.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7745/files/equidistant_projection.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2840/files/dusuraroxalixuzixotizep.pdf
    • https://cdn.shopify.com/s/files/1/0436/4432/1945/files/advantages_and_disadvantages_of_twisted_pair_cable.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_off0000685e.bin
3f3e90392a96e63fa90ed221766472ac8fc63c4cc7990442529ec0b3f0df4394		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685E 5216 bytes
font_01_sfnt_off00007a1e.bin
bfa98ef02a1c3ea997b9f318b2c96ed2b7b55b8204c3645e7cf5e819c792569c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A1E 10196 bytes
font_02_sfnt_off00009d06.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D06 4324 bytes

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