Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cde83848e85459d…

MALICIOUS

PDF

45.3 KB Created: 2020-08-22 02:05:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2aa31837ba4befa8bc688aef9bfb2cd4 SHA-1: 3540c48d450bc6e8d3977db17189a6eb0de9043e SHA-256: 5cde83848e85459da90b5d40234e3c89e6a982ad042fb0a7e9443e8b17c26415
154 Risk Score

Malware Insights

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

The sample is a PDF that contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=chiller+york+ycal+manual+en+espa%25C3%25B1ol+pdf'. This suggests the document is designed to lead users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly indicated maliciousness.

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=chiller+york+ycal+manual+en+espa%25C3%25B1ol+pdf
    • http://files.juliewiegand.com/uploads/1/3/1/4/131453480/dd1b72145be5fa.pdf
    • http://lupilamis.dulceyeseniarodriguez.com/uploads/1/3/2/3/132303079/6153892.pdf
    • http://nufuw.emilyrosenkrantz.com/uploads/1/3/0/7/130776483/lumenetaja-ragil-zibovaledezowob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/american_beauty_1999_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0462/8145/7824/files/fourth_grade_worksheets_free_printable.pdf
    • https://cdn.shopify.com/s/files/1/0433/9063/2101/files/76484107005.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/51429530160.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6597/files/31364289578.pdf
    • https://cdn.shopify.com/s/files/1/0437/8584/6933/files/41894707713.pdf
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/zedazimum.pdf
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/46874693526.pdf
    • https://cdn.shopify.com/s/files/1/0430/5341/6601/files/31519894775.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/84059466419.pdf
    • https://cdn.shopify.com/s/files/1/0428/7453/6103/files/99647188917.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000665e.bin
ddea64635a32e1bc52d0016c9cfd46c76195b3ddb360fbfa43bdf7b6e843ab22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x665E 5680 bytes
font_01_sfnt_off0000793e.bin
bcd0e0a105194c0a99c118dbf064ad22a7aa33210be638869bf42dd20a920b8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x793E 14788 bytes

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