Malicious PDF — malware analysis report

Static analysis result for SHA-256 226c1bf16f77c9ad…

MALICIOUS

PDF

40.5 KB Created: 2020-08-16 14:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 208e3b0a37247b9f5a550ff05992e435 SHA-1: ed32e11a560ea4b284494a8df1a9dfe1ea283fb6 SHA-256: 226c1bf16f77c9addeefb5dbde9fbcdd016001349f139c33fb8d1de40638a6eb
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a mass of external links, including one pointing to a known malicious redirector at 'ttraff.cc'. The document body, though malformed, contains text related to '3ds max animation' and the malicious URL, suggesting a lure to disguise malicious activity. The presence of numerous PDF links, many hosted on Shopify, indicates a link farm strategy 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.cc/pify?keyword=3ds+max+animation+with+biped+pdf
    • http://files.bethlehempresbyterianchurch.org/uploads/1/3/1/6/131607075/zowukinixawos-totobebuko-xajizuwaragi.pdf
    • http://zizikup.sterlingcanine.com/uploads/1/3/1/6/131636725/vopavonanim.pdf
    • http://files.coneywaffle.com/uploads/1/3/0/7/130738666/b9997.pdf
    • http://files.alphachichico.org/uploads/1/3/2/7/132740234/2485425.pdf
    • https://cdn.shopify.com/s/files/1/0429/5403/1270/files/bhagavathi_movie_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/1947/4856/files/annotation_worksheet_high_school.pdf
    • https://cdn.shopify.com/s/files/1/0429/2814/4543/files/jonamem.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/nisipotupumugafaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7369/0017/files/96946935719.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/waxipijotoku.pdf
    • https://cdn.shopify.com/s/files/1/0437/2863/4010/files/xesaravewedotixewudekafe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5959/0806/files/32829464722.pdf
    • https://cdn.shopify.com/s/files/1/0429/8866/7039/files/tuzupozebekotezada.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006125.bin
11c45ec7e49520ce94ffdeba634aad0aef846379c8a55fe40100f9d9dce2d914
pdf-font-stream PDF embedded font (sfnt) at offset 0x6125 5524 bytes
font_01_sfnt_off000073d9.bin
ee9872b73db00ee28c1b37f12f4fb68cd7163f0fa3f90599a5729b0a3a28dc34
pdf-font-stream PDF embedded font (sfnt) at offset 0x73D9 9788 bytes