Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba21db19e693474…

MALICIOUS

PDF

53.0 KB Created: 2020-08-24 02:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb96ac990295fe11f5249026ce2ca21c SHA-1: ecc5766069ce4b3e94203841632a9b36afd03e03 SHA-256: 2ba21db19e693474e9e68fa40c1d4ef39b33598eb4128bd321a3165734f8c62f
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the document's purpose is to drive traffic to malicious infrastructure.

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=alfabeto+griego+biblico+pdf
    • http://files.ata-myc.com/uploads/1/3/0/9/130969905/jefedigoxez.pdf
    • http://xeguraf.theboilershop.com.au/uploads/1/3/1/4/131454057/9617953.pdf
    • http://files.judimorningstar.com/uploads/1/3/0/8/130813755/4de6c117.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/nufunew.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1066/files/wumaziruwumulolirofusujog.pdf
    • https://cdn.shopify.com/s/files/1/0447/2215/9772/files/metabolic_equivalent.pdf
    • https://cdn.shopify.com/s/files/1/0432/5680/7586/files/the_human_centipede_full_movie_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0437/9190/9025/files/season_6_one_three_hill.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/41301650318.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/hemophilia_the_royal_disease_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/6359/1590/files/dovufizewuxazewudipibuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1219/3438/files/vehicle_bill_of_sale_ohio.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xawifakupubegezixezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lunugituvalu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4382/3511/files/18028148798.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006448.bin
68032a420e4a13d6e11cb9af8c4326406a16df729921b020c63c9bf8f5102b75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6448 6740 bytes
font_01_sfnt_off0000751d.bin
9eab7ecfbb8d0e8971297ecdc1079cdab7a395f9511f97e900ae696012963210		 pdf-font-stream PDF embedded font (sfnt) at offset 0x751D 5272 bytes
font_02_sfnt_off00008712.bin
51a7ea0f1d84a08d9c2b0bf8854bdbcfab9656b5ca60472936ab1bb23da76052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8712 1852 bytes
font_03_sfnt_off00009023.bin
2b96eac21345ea16dfa0b59668d91e10390cafbf6e01f5af41c56bc81597817c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9023 18928 bytes

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