Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9e188e06fbb26c…

MALICIOUS

PDF

50.7 KB Created: 2020-09-30 02:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8f3a9195f65c424b9e68392c3b7fb0f SHA-1: c96b0a02dc5f3040a132eba0a38db65f29adb64b SHA-256: bc9e188e06fbb26cc30df2572da44b1edfadf723423468dc08782b69f40fed59
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to suspicious domains and are likely part of a link farm designed for SEO manipulation. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the URLs, suggesting an attempt to drive traffic to these malicious sites. No scripts were extracted from this sample.

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://gettraff.ru/strik?keyword=rest+api+testing+using+postman+pdf
    • http://files.nepcoawards.com/uploads/1/3/2/7/132740270/jifowamifezabodifo.pdf
    • http://fodowafut.candacesam.com/uploads/1/3/1/4/131407283/tudugezem.pdf
    • http://wumited.thatweddingninja.com/uploads/1/3/2/6/132681504/51bfb8.pdf
    • http://files.lisa-rivers.com/uploads/1/3/1/3/131379559/sesow_zewofilijinox_buviwaxajiko_xiluditetom.pdf
    • http://simedise.bardstowncf.org/uploads/1/3/1/4/131482826/8243269.pdf
    • https://uploads.strikinglycdn.com/files/0e5e52bd-730f-4877-a836-01f1a0e3655f/63768794845.pdf
    • https://uploads.strikinglycdn.com/files/f763d8ea-8175-4511-a5a2-31d38474162b/doravoranumurulu.pdf
    • https://uploads.strikinglycdn.com/files/322b8f13-ecfe-4d1d-a916-8c6a7288c25b/gubunipukumivozalugija.pdf
    • https://uploads.strikinglycdn.com/files/35a51f7c-0f64-4ece-b377-3938b54d05f5/jedari.pdf
    • https://uploads.strikinglycdn.com/files/04861283-a37b-4762-943a-8fad02e671c5/nizedilifilinikabelo.pdf
    • https://uploads.strikinglycdn.com/files/60d98b68-f0a3-438e-afff-51357d79b49f/62670668751.pdf
    • https://uploads.strikinglycdn.com/files/4b6f2334-2b3a-4b62-8738-6da26daaf916/xofikin.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/7346296493.pdf
    • https://cdn.shopify.com/s/files/1/0430/2176/2723/files/senanutabelariwifigoge.pdf
    • https://cdn.shopify.com/s/files/1/0486/0923/1006/files/ice_bears_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0444/5123/3959/files/jonevafoxazarovoto.pdf
    • https://cdn.shopify.com/s/files/1/0477/0824/2079/files/7028912267.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073d9.bin
c96f9e2973f89af13c7122e06375ca19df8f82e18dccc9cf02ae01ec2232706f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D9 5124 bytes
font_01_sfnt_off0000853a.bin
0c575fd297d41b63d13e5b021cfc94ab112c36ca58a9db1c7beb9a751fdecad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x853A 13276 bytes
font_02_sfnt_off0000af84.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF84 4324 bytes

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