Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba19a210cfa9664…

MALICIOUS

PDF

57.2 KB Created: 2020-08-01 01:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d2559ebd0a5f651c32115401dcbaac1 SHA-1: 0defea5eaaf8384e88cb6982e1decf7575fbe7c5 SHA-256: 0ba19a210cfa96640dd3f2bac8059bff380be6974ef6c5f3acde201a74ce8273
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains the same malicious URL. This suggests the primary purpose is to lure the user to malicious sites, likely for phishing or malware distribution.

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.cc/pify?keyword=rurouni+kenshin+2012
    • http://files.coribachman.com/uploads/1/3/1/4/131438708/zolawadovutafi_ruxuv.pdf
    • http://files.citygroves.com/uploads/1/3/0/7/130739978/9560233.pdf
    • http://files.mplusfphotography.com/uploads/1/3/2/6/132682042/baf05.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/66013601135.pdf
    • https://cdn.shopify.com/s/files/1/0440/3838/9925/files/65923261128.pdf
    • https://cdn.shopify.com/s/files/1/0432/5074/5512/files/kerasamuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/raduvurebipafidin.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5003/files/2856959773.pdf
    • https://cdn.shopify.com/s/files/1/0430/2874/2298/files/college_physics_10th_edition_young.pdf
    • https://cdn.shopify.com/s/files/1/0434/4233/9992/files/konezigo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2664/4125/files/99395328475.pdf
    • https://cdn.shopify.com/s/files/1/0431/7026/7291/files/babit.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/40019896961.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/99163031652.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f7e.bin
bf74a361aef7385bf42bff6e45e945aad97a4ee993347178108acdb11d4d31cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7E 5164 bytes
font_01_sfnt_off0000917a.bin
e3054b7dc99a57d923fd2b3dc80b68811db4e2fb67198b1208d0a1df4519ac52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x917A 4728 bytes
font_02_sfnt_off0000a181.bin
d500b9360a0c77cb13817b7e1084e39addae74af5961cbd845c969c5c6ecf81f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA181 12608 bytes
font_03_sfnt_off0000c857.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC857 4324 bytes

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