Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a8adabe426524f5…

MALICIOUS

PDF

44.1 KB Created: 2020-08-06 06:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce791fac16b552d3665fabcca5204a07 SHA-1: 0c10aa4323c6fda820c4dc5e510f842cb2f86d57 SHA-256: 8a8adabe426524f5db6dd55c3b58c6c50331cd7d58dc63dff252b67a2049621a
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary heuristic identifying a malicious redirector. The document body, though partially corrupted, includes a URL that appears to be a lure for a specific PDF document. The ML classifier strongly indicated maliciousness, supporting the conclusion that this PDF is designed to redirect users to harmful 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://ttraff.com/pify?keyword=warhammer+40k+angels+of+death+supplement+pdf
    • http://files.ifluidics.com/uploads/1/3/1/4/131453253/82ff5498.pdf
    • http://files.friendsofelycemetery.co.uk/uploads/1/3/1/4/131453934/xewulabomuwat.pdf
    • http://files.hydrologicsportfishing.com/uploads/1/3/2/6/132680986/5411417.pdf
    • http://lurajeloj.therealaeon.com/uploads/1/3/0/7/130775506/xewatodenosa_zovanefemef_zixitumum_kefufegipore.pdf
    • http://files.ibmc-la.org/uploads/1/3/0/8/130873758/5e040c2.pdf
    • https://cdn.shopify.com/s/files/1/0440/6578/3958/files/javascript_module_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/zolomuzuvori.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5991/files/bubarogomobisowarasesof.pdf
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/bopinosukipopibijobowotib.pdf
    • https://cdn.shopify.com/s/files/1/0434/9650/5496/files/2020_19_spelling_bee_word_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2437/files/84626426752.pdf
    • https://cdn.shopify.com/s/files/1/0432/7528/8732/files/asites_usu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9918/files/kesivomobovesipewudijuguf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4192/2982/files/bizitudutufuvev.pdf
    • https://cdn.shopify.com/s/files/1/0433/4203/7150/files/lamusuwivokuderoguwosado.pdf
    • https://cdn.shopify.com/s/files/1/0435/8648/6440/files/57637301170.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/65167313260.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_off00006d89.bin
0347f91ae74e0167ead2bc3bde60095def6a0ba14de98d3436636e8e0a04a427
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D89 5760 bytes
font_01_sfnt_off0000810c.bin
515c9f7a08d68fe9f594d4ff79128f4053011eb81e81bfcc483dfb11be7eb7f7
pdf-font-stream PDF embedded font (sfnt) at offset 0x810C 9992 bytes